In the json_metadata object, a property called hide can be implemented which expects an array of strings which represent the app names the posts shouldn't be visible for.
Example for not showing content on steemit and busy:
json_metadata:{...,hide: ['steemit', 'busy']}
Let's say I'm using DTube and I no longer want the video to be showing.
json_metadata:{...,hide: ['dtube']}
With many Steem apps, a user's Steemit feed can be filled with content from different apps and sometimes they don't want it to show on their Steemit feed.
