The /search/ is the default slug used to display the results for the search page.
This feature help to change the default /search/ endpoint to something customized. As default the search url format is:
https://-domain-name-/search/search-word/
By using the option “find” the default url becomes:
https://-domain-name-/find/search-word/

Block default search url

After changing the default author, the old url is still accessible. This provide a way to block it and allows only the new one.