A page that changes each time it's viewed?

what gives?

[lizzie]

I just saw a page that is different each time it is viewed.
I noticed a page that ranks well all over AV, so naturally I checked out the source code. The META TAGS are different each time I look at it! I looked at it with this tool where It says: SEARCH ENGINES, see what they see, that I use when I want to see if cloaking is used and it just keeps changing the keywords and title no matter how many times I look at it--I can't see how it is done. They have lots of links to their other pages at the bottom, but the page always looks the same, except for the META TAGS. I never did find the page that is actually listed in the search engine. Anybody familiar with this?

[NFFC]

Does the page have a .cfm extension? They seem to be "burning brightly" at the moment.

[lizzie]

Yes! What in the world is it?
How is it that AV likes it so much?

[eljefe3]

.cfm is for pages which use cold fusion. It is a server side language which uses tags quite similar to HTML to generate dynamic output. It's a farily simple language to learn. For more info go to [allaire.com...]

[lizzie]

Thanks. I looked at some tutorials on it.
Now for WHY they do it?
It sounds like an awful lot of work.
What are the benefits?
And do the SEs see a different page each time they visit?
This wouldn't be a good thing, I thought.