Without knowing the details, a rule of thumb for deciding how to iterate in Prefect is if the inputs are possibly unbounded, then we recommend using LOOP. For example, if you’re walking each page of a news aggregator or comments section and don’t know how many there are in advance. If on the other hand the input is bounded and known/knowable, we recommend using a map over a list. For example, use a task to generate all the url’s you need to check, then map over them. And if you’re not sure, prefer map to loop.