nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
websites using the $ symbol on their website - meaning it may accept payment in this currency used in Israel.
Meta descriptions are HTML attributes that provide concise explanations of the contents of web pages. Meta descriptions are commonly used on search engine result pages (SERPs) to display preview snippets for a given page.
This page contains a meta robots tag which tells search engines and robots to index or not index the page.