Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services.

Google Analytics

Yandex.Metrica is a free web analytics system combining customizable reporting tools with behavioral analytics.

Yandex.Metrica

Tag Manager

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

Google Tag Manager

Site Elements

External Cascading Style Sheets define style rules in a separate CSS file.

External CSS

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Embedded CSS

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Inline CSS

Gzip (GNU zip) is a file compression algorithm.

Gzip Compression

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

~~Default protocol https~~
used until recently

Structured Data Formats

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Open Graph

Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets.

Twitter/X Cards

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

JSON-LD

Microdata is a specification to integrate metadata within existing content on web pages.

Microdata

Markup Language

HTML5 is the fifth revision of the HTML standard.

HTML5

Character Encoding

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.