ok, I am creating the meta tags (Keywords specifically)

I know this is a way to describe whats in the page... but do the words in the keyword list have to be in the page text for crawlers to "find" & list it?

say I have Weddings, Bouquets, Flowers in the keywords.. would the page text have to have these? is there a way to have a bunch of text in the page but "hidden" or off the bottom??

Thanks!