Web Files

PagePortrait gathers information about various web files present on a website. These can be useful for improving search ranking and authority.

Robots

Web site owners use the /robots.txt file to give instructions to web robots, and limit the URLs such robots access.

To read more, see here.

Sitemap

A sitemap is a file which lists the web pages of your site to inform search engines about the organisation and content of your site. Sitemap files are used by web crawlers to more intelligently crawl your site.

To read more, see here.

Favicon

A favicon (short for favorite icon), also known as a shortcut icon, website icon, tab icon, URL icon or bookmark icon, is a file containing one or more small icons, most commonly 16×16 pixels, associated with a particular website or web page.

To read more, see wikipedia.