Keyword modification is a useful concept if you plan to make the maximum use of your keyword management for SEO. The key to modifying your keywords properly is to take your primary keyword and use it in its multiple variations. For instance, if your primary keyword is “ski vacation”, there are a number of ways that you can utilize this phrase other than using that specific phrase as it is. You can pluralize it (ski vacations), turn it into a verb (ski vacationing, or vacation skiing), or split it up with words in between (ski while on vacation).
Keyword modification, however, is not just simply using the modified phrases on the same page with your primary keyword and there is more to it than simply adding new pages to your static website. It is a particularly useful technique for bloggers who write about a topic every day. You likely have a list of keywords related to your topic, and you should. If your keyword list contains 100 key phrases and each of them has 10 different variations that are potentially helpful for you then you’ve just expanded your keyword list to 1,000. Your list, however, is likely larger than 100. If your list has 300 useful keywords on it then you can turn that list into a list of 3,000 just by thinking up useful variations.
That’s not to say you have to use every keyword variation you can think of. But it helps to know that you can use the variations when you need them. Search engine optimization is not all about using the exact phrase every time you include a keyword phrase in your content. It is usually best to write in a natural language sort of way and to include your keyword phrases as necessary to make the language flow well for human readers.