LSI (Latent Semantic Indexing) keywords are terms and phrases that are similar to or related to the target keyword of a web page.
The purpose of LSI (Latent Semantic Indexing) keywords is to help search engines better understand page content by adding context and connecting the copy with the target keyword.
In terms of SEO (search engine optimization), LSI keywords are search terms related to the main keyword you are targeting.
LSI helps support content and adds more context to make it easier for both users and search engines to know what the content is about.
Latent semantic indexing (also known as latent semantic analysis) is a method of analyzing a set of documents in order to discover statistical co-occurrences of words that appear together and then provide information about the topics of those words and documents.
LSA and LSI are primarily used synonymously, and the information retrieval community generally refers to it as LSI.
LSI can statistically predict what meaning a word represents by statistically analyzing the words that coexist with it in a document.
By understanding how words occur together, a computer can better respond to a query by correctly matching the correct keywords to the search query.
Google uses BERT and neural matching technologies to understand search queries in the real world.
Transformers Bidirectional Encoder Representations is a transformer-based machine learning technique for natural language processing pre-training developed by Google.
In search marketing, there are two types of trustworthy and trustworthy data:
Factual ideas that are based on public documents such as research papers and patents.
SEO ideas based on what the Googlers have revealed.
Even though there is no proof in terms of patents and research papers that LSI / LSA are important factors related to ranking, Google is still associated with latent semantic indexing.
Applied semantics had created a technology called Circa.
Circa was a semantic analysis algorithm that was used in AdSense and also in Google AdWords.
Google’s purchase of Applied Semantics accelerated the trend of associating Google with latent semantic indexing, despite no credible evidence.
Back in the days when marketers were obsessed with a single keyword in an effort to get good rankings.
The key to creating amazing content is context.
More than 15% of daily Google searches are new terms that users have never searched before.
With trillions of searches being performed each year, that adds up to many new queries.
Since Google employees come up with so many different and unique ways to search for common problems, this is precisely why LSI keywords have become such an important part of Google’s ranking factors.
From an SEO perspective, using LSI keywords has very positive results.
By using LSI in content, you can boost its contextuality and improve search visibility.
LSI keywords to improve SEO, generate more relevant traffic to the site and attract more customers.
LSI stands for Latent Semantic Index (ing).
This is a computer program that is designed to learn a wide variety of synonyms based on context.
It is a method that uses mathematical techniques to find relationships between words and concepts within content.
Here is a more practical definition of LSI keywords:
In terms of SEO (search engine optimization), LSI keywords are search terms related to the main keyword you are targeting.
They help support your content and add more context to make it easier for both users and search engines to know what your content is about.
Most LSI keywords are words and phrases that are closely related to your main keyword.
A good way to understand the difference between synonyms and related keywords is to do a Google search.
Hundreds of thousands of Google queries are made each year that have never been searched. Google has made improvements to its algorithm to factor context so that you can better understand related keywords.
Incorporating LSI keywords into your content boosts the contextuality of your content and yields SEO benefits ”
They boost your website’s ranking in search engines: Sprinkling LSI keywords throughout your text helps search engines to understand your page and boost its ranking power.
Semantic keywords improve your content’s relevance: Adding related words also helps to ensure you don’t overload your content with keywords, aka keyword stuffing.
Related words increase the number of people who find your content:
LSI keywords also help you provide a better search experience for users, which, in turn, translates into improvements in various ranking factors, such as time spent on a page, bounce rate, and more.
LSI keywords don’t necessarily have any disadvantages, but the indexing method does have some limitations.
It doesn’t consider the order of words and disposes of all conjunctions and prepositions.
It considers words to have just one meaning.
It does not recognize underlying ideas and irony. In some cases, the meaning of the words may not match the meaning of the text.
If you’re wondering when LSI keywords became relevant, it all began in 2004 when latent semantic indexing was implemented in Google’s search algorithm. Its purpose was to assist the search engine in providing users with more relevant results.
But, Google wasn’t just focused on keywords. The search giant also wanted to understand anchor text in hyperlinks, as well as groups of sites that link to each other (also known as SEO neighborhoods).
With all this in one algorithm update, Google dramatically changed the way it delivers search results.
No longer was the search engine targeting exact-match keywords in web content. Now the algorithm could understand context and synonyms. Instead of looking at a single keyword and its frequency of use to find out what the page was about, Google could now analyze everything offered on the page.
To better understand the impact of this change, let’s take a deeper dive into LSI keywords and their relationship to SEO.
The Impact of LSI keywords on SEO
In the early days, Google’s crawlers, also known as “spiders”, would automatically find and scan websites by crawling from one link to another on connected web pages. As they crawled, they would look at the keywords on a page to help them identify its topic.
For example, if you were to publish a post titled “21 Tips For Effective Email List Segmentation,” Google would scan your page to determine if you used the term “email list segmentation” in key areas on your website, including:
The title tag,
Image alt text,
H1 heading, H2 and H3 subheaders, and so on.
But, after the LSI update, Google’s crawling method changed, resulting in these SEO improvements:
Google understands pages better
In addition to scanning your page for the main keyword, now it would also scan your page for various related keywords, such as: “email campaign,” “MailChimp,” “audience,” “subscribers,” “email tools,” and so on. What this means is, Google works to find out what the overall topic of a page is, and relies on latent semantic indexing to understand the content at a much deeper level than simply looking for multiple occurrences of a specific keyword.
Google reads pages contextually.
Basically, Google’s algorithm now has the ability to “read” a page the same way a human would, and categorize keywords depending on the determined context.
This means that the search engine can now differentiate between words based on even the smallest details. For instance, it can now tell the difference between literal and figurative expressions, like:
Google incorporates the overall picture of your business.
In addition to that, their algorithm is designed to weigh your business name, website, and industry to help Google get a well-rounded understanding of each page on your site as it relates to your business as a whole.
Google’s main goal is to provide users with the most relevant results possible, even for 15% of search terms that have never been searched before. That’s an astonishing quality standard that would be impossible for the search engine to achieve without latent semantic indexing.
Interestingly, it should be noted that although YouTube is owned by Google, they run primarily on two different search engines and algorithms. What has surprised me is that YouTube does not appear to use LSI keywords for rankings at the time of writing.
As a YouTube creator, I try to include top keywords in my video titles and rarely pay attention to LSI keywords, and the videos still rank well. The only place you could put them is in the video description, but it doesn’t seem like it’s required.
So while YouTube searches generate related suggestions, there aren’t many places to insert LSI keywords.
YouTube SEO relies primarily on high-quality editing to increase thumbnail engagement and click-through rate. Of course, I’m oversimplifying a complex algorithm, but it is a universally accepted truth that high-quality editing, rather than LSI keywords, is the most important factor in YouTube’s algorithm.
So while LSI keywords seem to be a big factor in the Google search engine, they are not that important in the YouTube search engine.
With that, let’s move on to the next section where you will discover 5 effective tools that will help you find LSI keywords to use in your posts.
Finding Related Keywords with LSI Keyword Tools
The first step in finding LSI keywords is creating a base of keywords that are important to your business. Once this is done, it will be easy to find related keywords. All you need to do is do a little research to discover endless possibilities, and for that, you need tools. Here are five LSI keyword tools you can use to find suitable related word selections.
1. Google autocomplete
Google’s instant search feature is the easiest way to find keywords related to your main one. All you need to do is type the target keyword in the Google search box and you will get a series of predictions on what you might type next.
Look for words that appear in bold as suggestions. Make a list of the ones that are relevant to your topic and incorporate them into your content.
2. Google-related searches
You can also type your main keyword into Google and then scroll down to the bottom of the page to find the “Related Searches” section. Check out the terms listed for more LSI keyword ideas for your content.
3. People also ask
Another incredibly effective but free resource, the “People Also Ask” box on the search results page will provide you with tons of more options. You can check out some of the results to see if there are any additional words you can use. Look for the ones that are in bold, as in the following example.
4. LSI graph
LSI Graph is a free LSI keyword generator that helps you quickly find all the terms related to your main keyword. Just type in the main keyword of your page and you will get a list of LSI terms to choose from.
Serpstat is another powerful tool that helps you find semantically related phrases for your posts. Just enter your main keyword and click SEO Research> Related Keywords. You will be presented with a long list of words and phrases to choose from.
Of course, there are many other related keyword search engines, including SEO tools from Ahrefs and Moz. These are great because they not only give you a comprehensive list of related keywords that people often search for on your topic, but they also allow you to filter the words and phrases by connection strength, search volume, and cost per click.
Now that you know how to find LSI keywords using free keyword research tools, let’s look at the best ways to use them in your SEO content and strategy. How to use LSI keywords for SEO
The keyword generation tools mentioned above will provide you with a long list of LSI keyword options suitable for your content. Now is the time to add them to your content and experience the important benefits of SEO.
Choose the LSI keywords that best fit your topic
Before determining how to incorporate LSI keywords into your text, you need to identify the ones that best suit your topic. For example, if you were writing a blog post targeting the main keyword “blog SEO,” the tool you are using might display an endless list of options, including:
SEO blog checklist
SEO blog topics
blog post seo tips
SEO Blogs For Beginners
what are the advantages of seo
Meaning of the seo blog
SEO plugins for bloggers
How to write a SEO friendly post
seo blog for beginners
SEO latest trends
how to optimize your post for SEO
…and so on.
As you can see, most of these are good (depending on context).
If you were creating a blog post for WordStream on the benefits of blogging SEO, you would pair the main keyword, “blog SEO” with relevant phrases like “what are the benefits of SEO” and “blog SEO for beginners”.
On the other hand, if the post was about the different ways to optimize your blog’s SEO, you would choose LSI phrases like “how to optimize your post for SEO” and “X SEO tips for blog posts”.
See the total monthly search estimate
Sometimes determining the best LSI keywords for your phrases can be really difficult, as some suggestions may make sense as a completely different post.
For example, if you were writing a post about “online course platforms”, you will see LSI keyword suggestions such as “online course learning platforms”.
When this happens, you need to determine whether the suggestion would make more sense as an individual article or as an addition to the original post. For me, I typically look at the total monthly search estimate to decide if it’s worth writing something new or including the suggestion as part of the original article I’m researching.
The keywords your tool offers will work for different contexts and you need to determine which ones will work best for the specific page you are creating.
During your research, if you find keywords that don’t fit your page, you can still annotate them for use on different pages so that you can improve your website’s overall SEO.
Add LSI keywords to your page
You should add your LSI keywords to the same places you would add your main keyword, including:
Meta title and meta description
Headers (H1, H2, H3)
Image alt tags
In the whole body of the text
Make sure to spread related words and phrases throughout your post in a way that sounds natural. This will help broaden your opportunities since you can’t use the main keyword over and over again in all the important areas of your page.
Focus on user experience
Don’t abuse LSI keywords in your content. While these are not your keywords, exactly, it is quite easy to abuse them and if you do, you will be penalized for it. You want to include enough related words so that the context of your page is immediately clear to Google and other search engines, but without ruining the reader’s experience.
To do this effectively, you need to add related keywords while keeping your content cohesive, natural-sounding, and easy to follow. This will help you not only avoid penalties but also improve your visitor experience and ultimately make money from blogging.
Final tips for using LSI keywords for SEO
Here are some general rules of thumb for implementing related words in your content to improve your SEO strategy:
Don’t overdo it with the use of synonyms
Write how you speak. If I wouldn’t say it in real life, it doesn’t belong in the text
Use a fixed ratio of related words and phrases to the rest of your content (for example, one LSI keyword for every 200-300 words).
Although having a ratio like the one above isn’t perfect, and certainly doesn’t guarantee you’ll rank for any of your chosen LSI keywords, it’s a helpful guide to get you moving in the right direction.
Regardless of how often you use LSI keywords, your top priority should always be to provide clear, concise and useful information that helps readers find the answers and solutions they are looking for (while helping you achieve your business goal of transforming readers into paying customers, of course).
If you write with the goal of providing value first, you will find that you will end up using related keywords naturally throughout your text without any conscious effort.
Incorporate LSI keywords into your SEO content and strategy.
Google has made great strides in artificial intelligence and machine learning. In fact, it’s pretty scary how smart Google has gotten!
More and more LSI keywords are being used by the search engine to find the context of any content, and this is why it is worth spending time learning how to leverage these valuable keywords in the SEO strategy and content marketing campaigns.
The information is what LSI keywords are, why they are important, how to find them, and the different ways to use improve the overall online presence. Find a piece of content on the website that can modify and improve with the tips.