Google Ads works equally well for an online store with thousands of products and a local business with a single service — but the setup is different each time. For e-commerce, that means Shopping and Performance Max with a properly configured Merchant Center feed. For B2B and services, it means search campaigns with precise keyword targeting and call/lead tracking all the way to the sale.
If you don't have an account yet, Google Ads setup from scratch starts with goals, campaign structure, and conversion tracking. If you already have one, ongoing management and optimization are built on regularly analyzing the data — what's working, what's wasting budget, and where leads drop off between the click and the purchase.