Meta tags are used to summarize information of a page for search engine crawlers. This information is not directly visibles to humans visiting your website. The most popular are the meta keywords and description tag. These meta tags to be inserted into the area of your page. A couple of years ago meta tags were the primary tool for search engine optimization and there was a direct correlation between keywords in the meta tags and your ranking in the search results. However, algorithms have got better and today the importance of metadata is decreasing day by day.