With the rise in feature cards within SERPs (search engine result pages) it’s important to make some changes to your WordPress installation to prevent it from removing structured data or microdata.
- Download and install the Advanced TinyMCE Configuration Plugin
- The option name you want to add is: extended_valid_elements
- The option value you want to add: @[itemscope|itemtype|itemid|itemprop|content],div,span,time[datetime]
This is by no means going to cover all of the possibilities when adding rich data, but should give you at least enough of a model to continue to add tags you need to customize. Be careful if the structured data has errors the effort will be worthless. To validate be sure to use the structured data testing tool to verify the new structured data and type.