Your page description is often used as a snippet, in google search results, since the use of personalised search
for non logged in users, its important to get an attractive description, not only to increase click through rate,
but so your website is pushed up in their personalised results, which means that next time they search, you may be
at the top.
Google does not take into account words used in descriptions, but clearly if you have spammed a word, it could
go against you.
I always add an accurate two sentance description. If google thinks your description is not accurate, they will
take your snippet from somewhere else.
> Make sure your page description is different on every page.
Can I make sure Google always uses my meta description tags for snippets?