I'm trying to get on the first page for "halo 2 glitches" search. So the page I am working on is already indexed, but I just added a few more keywords to it. How long will it take Google to notice that it has been changed, and index the changed page?
They will probably notice it the next time the bot hits your site but keep in mind that doesnt mean you will see an improvement right away.
Depends on how frequently the google bots visit your sit. after they visit it takes about 1 week in my experience