Which structured mark-up works best?

[PoolMaster]

Which structured mark-up works best?

[ImpalaWardrobes]

Structured Data helps search engines better understand what the content is specifically about. Moreover, structured data will allow users to see the value of a website before they visit, via rich snippets, which are rich data that are displayed in the SERPs. ... Structured data is a HTML markup that comes as a code.