Jeff,
Apart from browsers (which read them but don't do anything with them), and search engines (which generally ignore them), what "other software applications" might use the "huge amount of information" you lock up in <meta> tags? If YOU have a use for them - and you may well do so - then fill them in, otherwise don't waste your time.
Google don't say what they do with meta keywords, but then they say very little about how they index and rank sites anyway. That's partly because their algorithm is constantly changing, and mainly because they want to keep it secret from competitors and unscrupulous SEOs.
A good article about the (non) use of meta tags by search engines can be found at
, a second article on the same site (
)comments
"Google doesn't completely ignore meta tags [...]. They may give a very low weight to keyword tags (we'll never know how much). More importantly, the index will grab a description meta tag as a "fall-through" if a site's home page doesn't contain much if any usable text, nor alt tags on images."
There are a lot of webmaster advice pages dotted around the internet that tell you it is
vitally important to devote lots of time to your <meta> tags in order to get well listed. This was true once, but it isn't any more. Unless you have your own uses for them, you can spend your time better on writing new content.
What uses might you have? The best one I can think of is for your own site's internal search engine. You can trust your own meta tags not to include useless spam, so you may want to make use of them when ranking pages. General search engines don't have that luxury.
-- Chris Hunt