Ad copy generators fall into four groups: general LLM assistants, PPC-specific generators, Google's own automatically created assets, and full campaign builders. General assistants write the most interesting copy but count characters badly and know nothing about your account. Google's automation is free and compliant but gives you no control over messaging. Paid platforms earn their price on workflow at agency scale. Campaign builders win when the bottleneck is everything after the writing — keywords, negatives, extensions and the upload. Whatever you use, delete every claim that is not literally true before launch.