The other side of the coin - the sins of commissioning companies
Look not only at the hands of the selected SEO agency, but also to yourself. It turns out that it is the lack of cooperation on the part of clients that is one of the most common causes of failures in optimization processes.
So before you sign the contract, think about whether you can spend some time for the benefit of the whole process. The agency may ask you for additional information, access, graphics and many other things. You need to reserve a moment, especially at the beginning of the activity. You can not do it? In that case, this is not a good time for positioning.