I accidentally found a website that offers free advertising campaign audits — 5radv select https://5radv.com/en/brief-free-advertising-audit.html . At first, I thought it was just another marketing ploy, but I decided to give it a try. I was pleasantly surprised that they really analyze the effectiveness of advertising and give clear advice on how to improve results. Everything is clear, without unnecessary “fluff,” and most importantly — it's free.