Is there any way to get keywords for each page automatically from page content?

[Kristaps]

Hi,
is there any way to get keywords automatically for each page from page content?
i don't want to enter keywords for each page manually because i'm too busy working and don't have time to input keywords for each page on web site (there's more than 200 pages)

maybe there is some kind of tag or module which can do that?

[Kristaps]

[tsw]

how would the module / tag know what words to use?

and besides, keywords isnt used that much anymore. Google already checks your content.

[Kristaps]

module/tag checks {content} block for that page and prints out 15 most recently used words.
and google still checks for keywords if they are specific for content