Hello. This is a very good question.
Given that I am only a month and some days in SFI, I do not know how I can help on this issue, but I learned a lot, read a lot and I'll try to give a specific answer.
The basis is to learn to properly represent the work you do, show a simple and efficient to do,.
good ad is a 90% success rate.
Be an original, do not copy paste. If you manage to make a good ad and you have not copied anyone, then you learn the job. and you're successful.
