Latent Semantic Indexing, or LSI for short and keyword density are just what it means to have a particular keyword density within your actual content. These two concepts are very important so be sure to take note of them.

The term LSI stems from a mathematical factoring analysis technique that's been around since the 1960's. In 1988, a now-expired patent was awarded to a team of researchers who used the technique through the applications of data retrieval in objects.

Today, it's part of Google's core algorithm, with an enhanced rollout that came with the introduction of the Google Hummingbird algorithm adjustment. Google Hummingbird was solely meant to enhance semantics m search to better understand specifically what you're asking.

Hummingbird is a direct representation of Google's desire to enhance relevancy in search. If you ask it a question, it wants to be able to answer it with a high degree of precision. That's what relevancy is all about. People count on Google to provide the quickest and most relevant results first.

What's important to note when it comes to LSI is that Google knows when phrases or keywords are related to one another. So if your primary keyword on the page is "how to make money online," your LSI variations of that keyword could be "making money online," "methods for generating online income," and so on.

Each of these instances is an LSI occurrence of the keyword and it needs to be counted towards the overall keyword density of the article. The best way to write the LSI keywords is just to keep the primary keyword in your mind and be sure to write an LSI variation of it in every other paragraph of your content.

Another professional pointer when it comes to crafting LSI keywords, is to write out 10 sentences with a variation of your keyword in each of the sentences. Don't try to interlace those specific sentences into the content, because it will likely sound forced. What it will help you to do, however, is to think about alternate ways of saying the same thing.

For example, let's say that we wanted to do an article about "how to take massive action." What are some ways of re-writing that to say primarily the same thing? Can you think of a few different examples? Well, we don't have to look too far. Let's take an example of LSI keywords directly Google.

In fact, if you Google the keyword "how to take massive action," what you'll come to find is Life Hack in the first slot, Tony Robbins in the second slot. a YouTube video in the third slot and my article in the fourth slot. Here are the tides of the first Live articles for that particular search:


Now, as you can see, each of those tides has the words all massive action" in them. However, what they don't have in them is the "How to take"part. This is an important distinction to make because even when the title lacks the exact-match keyword that you're searching, you'll still find the relevant results.

This is the result of Hummingbird and LSI in effect. Of course, the title isn't the only important factor that's weighted in this search. In fact, there are over 200 different factors that weigh into Google's current iteration of its search algorithm. This includes core algorithms and ancillary algorithms.

Now, there's something important to note here in the titles. In the fifth listing on this SERP, you'll see three dots at the end of the title. That means the title is too long for the SERP. Once you pass 70 to 71 characters, Google will simply add in the continuation dots in there. It's best to not go over that if you can avoid it.

In fact, this is a recent change to Google's SERPs. Prior to this, titles were generally in the range of about 50 to 60 characters in length. It's only been recently that longer titles have been rolling out. Still, as a general rule of thumb, try to stay under the 70-character mark if you can when crafting your keyword-rich titles.

Another thing to notice is that Google highlights the keywords in the short description that you see beneath each listing's title on the SERP, which by the way is comprised of 156 characters in total. This is either drawn from the user-defined meta description on the page or selected by Google from the text.

What you should find really interesting when it comes to LSI and Hummingbird is that in the search we just conducted for "how to take massive action," the order and appearance of the words in all five of the listings on the first page of Google's SERP isn't consistent whatsoever.

Here's what appears in each of those listings when it comes to the keywords related to our search. I'll place bold on the keywords in similar fashion to the way Google does it directly in the SERP just so you can quickly reference back the order of appearance of the words related to this search.

  1. Timo Kiande • suggests 6 simple steps that all you to take action in ci smart and massive way. — In this description, you'll notice the words lake action appearing separately from the word massive.

  2. Complete your own Massive Action Plan in the graphic below to bel p you stay on track. Write down the results you want to achieve. Write down your purpose (compelling reasons why you want to accomplish your goals). Develop a sequence of priority actions. - In this result, which comes from Tony Robbin's website, you'll notice that massive action is highlighted in the beginning, then the word actions (plural) is highlighted in the last sentence.

  3. Tony Robbins MASSIVE ACTIONUeff Arguello ... How to Take Action — Anthony Robbins — Duration 18:02 ... — So far, this is the only result on the SERP that has all of the keywords within it, although they don't appear in the particular order that we searched. Massive action appears before how to take.

  4. But massive action is the fuel that powers the engine that we call life. Without taking massive action, we couldn't realke our goals — we'd be stuck in neutral ... — In this one, which is a result from my own website, you'll notice that although massive action appears twice in the description, Google has only highlighted the second appearance of it, taking massive action.

  5. Whenyou take or no action,you will receive mediocre results. This is the law of the universe, and there isn't anything that you can do about it ... — In this particular listing, the word take appears before action. However, the word massive doesn't appear at all in the description; only in the title.

While the order and appearance of certain words on a SERP's title or description hold some importance, it's the quality of the content and the amount of authority that it holds that ultimately prevail. What you'll come to find is that on some searches, the title and the description have little in the way of those exact-match keywords.

When that's the case, Google is defaulting primarily to the content itself and analyzing a number of signals when it comes to how well it's written, how many other sites have linked to it, and how often it's being linked to or shared on a daily, weekly or monthly basis, and of course, the appearance of LSI keywords.

Here's another example of LSI in action for the search "How to discipline yourself." In this particular search, what you'll actually notice is that the first and the third SERP listings are exact-match titles. The first three titles of the search on this particular SERP are as follows:

  1. How to Discipline Yourself with 10 Habits I wanderlust worker. corn
  2. 5 Proven Methods For Gaining Self Discipline forbes.com
  3. How to Discipline Yourself (with Pictures) wildhow.com

Also, another thing you might notice here is an answer at the very top of the SERP before any of the listings begin. You've likely seen this before yourself. This answer appears within a highlighted box at the very top of the SERP and carries a special weight with it. Often, we can get the answers to our questions right at the top in this manner.


The answer comes from the first position on this search. This is part of what's called Google's Knowledge Graph. The knowledge graph is Google's way of providing information to the user without the person having to sift through SERP results.

For the time being, you can try it out yourself by typing the name of a famous person such as "Leonardo Da Vinci." In that case, when you're searching a person, the knowledge graph information appears on the right-hand side and includes photos, a brief description from Wikipedia, and other relevant facts.

However, what you might also find interesting with these top three listings on this SERP are that forbes.com and wikihow.com have both enormous authority and are aged domains, while my domain, wanderlustworker.corn does not. So how is it that I'm outranking these two very popular sites?

Obviously, we'll get into this in the strategies portion of this book. I'll coach you and give you the guidance necessary for making monumental leaps forward. But don't expect it to be easy. For now, what's important to understand is how big a role LSI plays in content optimization.

Now, coming back to our search on "how to discipline yourself," what you'll find is that although the first and the third results are exact-match keywords in the titles, the second result, from Forbes.com, isn't. In fact, the second result has only one of the words in the title, namely discipline.

So how is it that a title like "5 Proven Methods for Gaining Self Discipline" can rank for the search "how to discipline yourself' while the other two surrounding it are exact-match titles? Of course, the answer here resides not only in the analysis power of LSI, but also in a variety of other factors such as the domain and page's authority and age.

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