nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Really Simple Discovery is a way to help client software find the services needed to read, edit, or "work with" weblogging software.
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.
Indicates that the site provides an interface specifically for searching the document and its related resources.
This page contains a meta robots tag which tells search engines and robots to index or not index the page.