Meta tags are small tags/sign-boards that help the search engine crawler to tell what this site is about or the post is about.
Search engine spiders and crawlers are automated programs. They often misjudge the article based on the content. This results in poor ranking. A good meta tag tells the spider about what the article is. It helps crawler in fast indexing your site and better search availability.
PuppySEO Meta-tag generator is a tool to easily create meta-tags. In PuppySEO Meta-tag generator small easy to interpret slots are given which you need to fill. Once filed it generates the meta-tag that you can apply on your site or pages/post.
There are numerous plugins available in the market. These are free to use the tool. You just need to fill in the generated meta-tags there. (Meta-tag inserter)