Meta tags are less important than they used to be. We have a full guide explaining how
search engines work which may be of interest for you. There are a number of schools of thought with regard to meta-tags.
Most agree they are not very important and they are often misused.
If you are wondering what to place in the tags the following advice may be useful:
The only use of the META-DESCRIPTION tag is to provide a nice description that may be shown in the search engine results pages (SERPs) of some engines. It will not have any effect on ranking.
The META-KEYWORDS tag is even less important. The best advice here is if you are going to use it you should avoid duplicating keywords at all cost.