Really Simple Discovery is a way to help client software find the services needed to read, edit, or "work with" weblogging software.
Website using the € symbol on their website - meaning it may accept payment in Euros.
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.
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical", or "preferred".
Google's hosted library for web fonts. Allows websites to choose and use fonts from a free, wide variety of fonts.