How to choose without overthinking
Use automatic when you are testing hosts and the anchor wording barely matters. It is fast.
Switch early. Move to instructions as soon as a campaign has a point of view. A brief of nine lines turns generic output into text that fits your page. The decision tree tells you what to ask for. Placements are permanent, so wording you dislike stays for good.
Pick the finished article for the two or three placements that you would show a client. It costs hours. It also removes the guesswork. It also puts the responsibility for accuracy fully on you.
Whichever mode you pick, the basket review is the last point where you can change it. After payment the order is on its way.
A last point on time. The automatic route suits quick tests of hosts, a finished article may take a content team a full working day, and a brief sits in between at roughly the length of a long email.
Check the order status afterwards. Every placement appears under ordered links, usually live about 24 hours after payment.