I want to make an ad that will change the keyword depending on what thye search for. Say i was doing it for stocks my ad title would be Stock quote for ____ and in the underlying blank would be the symbol the put into google. I would also have loaded up a bunch of symbols as keywords.
Yes, Google is exactly the same directive. Note that {keyword} will insert the keyword you choose, not the one the searcher typed in. Also, {keyword} will insert the word in small letters, {Keyword} will capitalize the first word and {KeyWord} will capitalize the first letter of all words.
Using exact match or phrase match is highly recommend with this, otherwise the broad match keyword that is displayed may be very different from what the user searched for.