Google Search console is a free web-based SEO tool for webmasters used to follow and effect the indexing and crawling status from a mobile and desktop Googlebot. https://search.google.com/search-console/about
Google search console provides data and configuration control for your website as well as a variety of visitor metrics such as organic clicks. Most webmasters use Google Search Console because it grants direct insight from Google on how the search engine views your website.
Search Console Data Highlighter – is a webmaster tool within Google Search Console which is used for teaching Google about the pattern of structured data on a website.
Once your data is structured in a recognisable pattern within your website you use data highlighter to tag the relevant data fields. With this info, Google can present your data more attractively — and in new ways — in search results and in other products such as the Google Knowledge Graph.
You can use Data Highlighter to teach Google about the following types of data on your site:
The best article on data highlighting is Googles own support page on the subject. We work to ensure all the required fields appear in your web page and that all elements and page sets are tagged appropriatly. We work to Googles advised best practice standards.
Why Structure Data with Data Highlights
Structured data is a standard vocabulary from schema.org which search engines use in order to capture and communicate highlighted facts and general intent from a set of pages within a website. If your website is formatted in a specific way, where content elements are presented in a standardised format, you can teach Google via data highlighter to recognise the formatting.
Google is then able to display these data highlights as rich snippets within its search page results.
A good example of this would be a cinema or film listing if you run a search for a specific cinema in a town and city and you should see what film is playing and at what time, within the search results page.
Webmasters performing data highlights are feeding formatted content which Google can interpret and then display as ‘snippets, info cards, carousels, knowledge boxes’ and more.
Full article on structured data