The page title is probably the most important on-page factor for search engine optimization. A properly optimized page title can help improve rankings as well as possibly increasing the click-through-rate on the organic search listing.
Description Meta Tag
The description meta tag is important as well. Most of the search engines use a snippet of the description meta when displaying the site in organic search rankings. The description meta can also influence the click-through-rate for your listing. Some of the search engines will also pull this snippet from the on-page content as well. This happens when the on-page content matches closely to the user’s search query.
Keyword Meta Tag