Use unique descriptions for each page

Use unique descriptions for each page using a single description meta tag across all of your site's pages or a large group of pages
Avoid:
Having a different description meta tag for each page helps both users and Google, especially in searches where users may bring up multiple pages on your domain (e.g. searches using the site: operator). If your site has thousands or even millions of pages, hand-crafting description meta tags probably isn't feasible. In this case, you could automatically generate description meta tags based on each page's content.

Use description meta tags to provide both search engines and users with a summary of what your page is about!