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Webmaster tools provide you with a free and easy way to make your site more Google-friendly.

Apache has been the most popular web server on the Internet since April 1996.

Varnish is a web accelerator / reverse proxy caching server.

The website claims XHTML Transitional status. XHTML 1.0 Transitional is the same as HTML 4.01 Transitional, but follows XML syntax rules. It supports everything found in XHTML 1.0 Strict, but also permits the use of a number of elements and attributes that are judged presentational, in order to ease the transition from HTML 3.2 and earlier. These include center, u, strike, and applet.

Meta tag containing keywords related to the page.

The description attribute provides a concise explanation of the page content.

This page contains a meta robots tag which tells search engines and robots to index or not index the page.

Several search engines use this meta tag to find out when they should revisit a certain page.

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML

The map tag is used to define a client-side image-map. An image-map is an image with clickable areas.

ISO 8859, more formally ISO/IEC 8859, is a joint ISO and IEC standard for 8-bit character encodings for use by computers. The standard is divided into numbered, separately published parts, such as ISO/IEC 8859-1, ISO/IEC 8859-2, etc., each of which may be informally referred to as a standard in itself. There are currently 15 parts as of 2006 excluding the abandoned ISO/IEC 8859-12 standard.