A store locator answers "where are you". A product locator answers the question shoppers actually have: "who near me has the thing I want". You link Shopify products to locations, and the map starts filtering by product.
Linking products and product search need the Premium plan.
Step 1: Link products to locations
Save the location first if it is new: linking needs a location that exists.
Nothing on your storefront changes until at least one location has products, so this is the step to do first, and the page counts how far you have got.
What to do next
The wording shoppers read, the product search placeholder and the "Show products" label, is under Settings then Translations.
Stuck on any of this? Open the chat in the bottom right corner of the app and we will help you set it up.