Database
[{"_id":{"$oid":"61a392cc54e3752cc718405f"},"talent":{"firstName":"sadfsadf","lastName":"fhjgdfgh","webResults":[{"type":"VIDEO","date":"2021-11-28T14:31:40.728Z","platform":"Repellendus","link":"*****","title":"*****"},{"type":"BLOG_POST","date":"2021-11-28T14:31:40.728Z","platform":"Repellendus rerum","link":"*****","title":"*****"}]}},{"_id":{"$oid":"61a392cc54e3752cc718405f"},"talent":{"firstName":"aaa","lastName":"bbbb","socialLinks":[{"type":"FACEBOOK","url":"fghjk.com"}]}}]
Query
db.collection.update({"talent.webResults":{$exists:true}},{$set:{"talent.webResults.$[].title":"*****"}})