What gets easier
You can write proper titles for every product, build dedicated Search coverage for each, and actually know which one carries the account. Large catalogues make all of that impossible.
What gets harder
- Conversion volume for automated bidding — five products means fewer sales to learn from.
- Concentration risk: if the one winner gets disapproved, there is nothing underneath.
- Shopping has less to work with, so Search does more of the job.
The approach
Search-led, manual or maximise-conversions bidding until volume builds, and obsessive attention to the product pages — with five products, page quality is a larger share of the outcome than the bidding is.