The webmaster can influence robots by placing a file in the root of the website.This file can allow access to pages and folders or prohibit access. is a simple text file which informs the robot of the search engine which pages and folders may or may not be indexed.
The helps search engines to crawl your website better. is a special file which tells search engines which pages of a website have to be indexed.
The sitemap is an XML file which consists of a list of URLs of the website and a number of extra data such as a page's importance and how often the page changes.
Lipperhey analyzed the HTML code to see how the page was built up.
The HTML size is the size of all the HTML code on this page.
The code density is the ratio between HTML code (66.87%) and the actual readable text (7.47%).
If a page contains a high code density, that means a lot of code is used to display the text.
At best, 30% of the page has actual readable text (in your case this is 7.47%).
This is why we recommend minimizing the amount of code to a maximum of 70%.