URL address of your site
The name of the blog, the address of the website, the URL of the blog, It is the first thing the Google robots see on your blog. First impression is most important, your blog URL reflects your primary content. It is always better to include atleast one keyword into your blog URL. This apply to each post as well. Keywords in URL are always given more priority.
Keywords
An algorithm will not read everything found in your blog, but will look for clues and signs that say what he content is about.These keywords are category indicators. The keywords help the robots to sort and organize content that was found.
