In the SEO [1] ribbon you have Robots [2]. "Robots" or "crawlers" are the names for what search engine uses to find information about your page, the robots.txt file will help search engines find content on your site easier, or will tell them not to look at some parts of your site if you so choose.
If you click on Robots, a window name Robots [3] will open. Here you can Upload [4], Remove [5] or Download [6] your robots.txt file. You can aslo see the content [7] of your file.