Keyword Effectiveness Index (KEI)
Keyword Effectiveness Index (KEI) is an important parameter that every SEO expert must know. Before we try to understand this key parameter, let us try to understand how an SEO expert decides which keyword to choose when attempting to optimize a website for a certain keyword.
The first important parameter is the number of search volume for that particular word. Ideally we would like to optimize for a keyword for which people are searching more on the internet. This will lead to greater traffic on the website assuming it is optimized to come on the top. So if Keyword A leads to 10,000 searches a month and Keyword B leads to 5,000 searches a month and, assuming it is possible for us to optimize for both the keywords and we have to make only one choice we will choose the Keyword A. This is clear and straightforward.
It however, turns out that the keywords A and B are not equally easy to be optimized. As an example it turns out that the Keyword A results in 2,00,000 results in google while keyword B results in just 120,000 results ? Obviously Keyword B is much more easier to be optimized since the number of search results are far less. We stay content with just 5000 search result and have it optimizes.
SEO experts use the term Keyword Effectiveness Index (KEI) to combine these two parameters. The Keyword Effectiveness Index is defined as
KEI = (P^2/C)
where
P = Number of search volume of the Popularity of the Keyword.
C = Number of Search results or the competiveness of the Keyword.
Here P^2, means square of P. Popularity of the Keyword is another term for the search volume. The more the people search for a keyword the more popular is the keyword and hence the name. Competitiveness is another term for the number of search result. The more is the number of the search result, the more competitive is the keyword.
Next time you need to decide which keyword should be used to optimize the webpage for, you should calculate the KEI for all possible keywords and choose the one that has the highest v alue.



