YML feed is a feed that developed on your side to transfer the goods (prices) to catalogs.
Documentation on formats of YML-feeds:
Attention!
1. YML extension - not mandatory, XML is possible.
2. The feed structure is important.
3. The feed size shall not exceed 10 MB.
After preparing the feed, you need to verify the feed in the validator. To do this:
- Go to the validator page here.
- Choose the document validation pattern Market.
- Choose a source of XML-data for validation by link.
- Click Verify.

If the validator shows errors, then it is necessary to correct them.
After correcting the errors, you need to upload the feed to your personal account. You can find out how to do this here.