Do I need campaign groups?

Groups let a cast-iron line run a different target from a cutting-board line, which is how sellers actually think about their catalogue.

If everything you sell has similar margins, one account-wide target is genuinely fine and simpler. If margins vary a lot, one blended target means over-investing in thin products and under-investing in fat ones.

AutoPPC infers groups from your campaign names and asks you to confirm the names. You should never need to see or write a matching pattern during ordinary setup.