Amazon ad campaigns are not a quick solution. They take a while to become effective because finding the best keywords and keyword phrases requires daily tweaking and refining, sometimes for months. It also takes time for ads to connect to Amazon’s algorithms. For this reason we run Amazon ad campaigns for a minimum of 3 months. Any less than that does not give the ads a chance to engage and find their lane. But when a campaign does find its lane, it will be the most important investment you make in your book.