Do a search on the keywords you wish to use and look at the first few ads that come up and copy them. If that ad is working for them it will work for you.
Make sure you use exact searches in the square brackets, ie [keyword] and don’t use general terms, use as specific phrases as possible.
Put the keywords in your description somewhere because they come up in bold when someone searches them.
I have had good results following this formula: Put the title of my site in the first line. Put a question in the second line. Put a followup in the third line.
So something like this for gameboys:
Gameboy Central
Want the best gameboys ever?
Make sure to visit us today!
I hope this helps
Spade’s Casino & Sportsbook