Let me paint you a picture; You're sitting in your office, head in your hands, sweating over the last campaigns - frankly - disappointing results. That's no new situation - you've been there before, maybe even just a couple of months before - same story, and that sucks - honestly.
Now let's assume your ads brought in a ton of traffic but you just didn't convert this traffic to active buyers - and why is that? The ad wasn't good enough? Your landing page sucks? - Could be, but the fact is that you thought your campaign was great, turns out - it wasn't.
Now let me paint you another slightly different picture of you sitting in that excact same office but now it's hands over your head, feet on the table and your computer which is literally stuck on the notification "New Order" - now that would probably be a much happier you in that story.
It can be - just make sure that the difference between story number 1 and story number 2 is that you hire me to do your copy - after all you just read this entire description even though all I did was assume that your campaigns are bad :)
Now, I can't think of any better description of my skills than showing it to you right there - looking forward to hearing from you.