What does it do?¶
Structured data is essential for search engine optimisation nowadays. This extension allows the easy integration of structured data based on the schema.org vocabulary on a TYPO3 website. A good introduction to the topic is provided by Google: Understand how structured data works.
There are also browser extensions available which ease the testing of the markup, e.g. Structured Data Testing Tool for Chrome.
For the differences between the versions have a look at the change log.