Some engines, such as Google, use keyword proximity as part of their ranking formulas. So what’s it mean? Keyword proximity refers to how close keywords are to each other. You want to put your keywords as close together as possible and make sure your sentences are clear.
Here's an example:
Meow Mix sells the very best cat food as far as taste tests of actual cats are concerned.
versus
Meow Mix scored number one in taste tests to see what kind of food is really preferred by the typical cat.
The two keywords are "cat" and "food." If a user searches for "cat food," the first sentence will rank higher because its keywords are closer to each other. Why do search engines do this? Because if you’re searching for “running shoes”, a page that contains “running shoes” is probably relevant, but a page that contains, “I was running late for work and forgot to put on my good shoes,” probably is not.