Evaluate the following scenarios to determine which would benefit most from implementing Google Shopping Ads:
- Scenario I: An online bookstore that wants to highlight specific titles and authors in search results.
- Scenario II: An ed-tech company offering online courses looking to increase enrollments.
- Scenario III: A retailer with a large inventory of electronic gadgets seeking to boost online sales.
Select the scenario(s) where Google Shopping Ads would be the most effective strategy.