Hintaseuranta is a service that gathers product information from multiple online stores and lets people find the most affordable prices for products. If you want to, you also can join the Hintaseuranta service and attach your online store to it.
You can read more information about Hintaseuranta on their webpages.
Installing the app
The product feed for Hintaseuranta
Hintaseuranta needs a product feed from your store to access your product information. You can find the feed's URL-address by going to Online store > Settings. There's a Feeds section where you can copy the feed URL and then send it to Hintaseuranta.