The Sitelinks Search Box is a search box that appears within a result on Google. It allows you to search on a website that was shown in the search results on Google.
Example
Here is an example you’ve forgotten the exact URL, but you remembered that the website’s called YouTube. So, you go to Google.com and enter ‘youtube’. Google now serves you the following results, where the first one has the new Sitelinks Search Box.

So, this Sitelinks Search Box will allow you to search for ‘movie’ before you even entered the website (www.youtube.com) itself.
You will find this option in the WordPress Dashboard -> Structured data -> Settings -> Global -> General Settings -> Check this “Website Schema (Global)” after that check “Sitelinks Search Box” option and then click on the “Save Settings” button.

That’s it for this tutorial!
We hope it helped you. If you have any feedback or questions or do you want us to create compatibility for any other schema type which isn’t listed in our plugin then you can request us we will surely implement it as soon as possible.
Just contact us here and we are always available for you.