What's the use?
This feed indicates to Google the quantity of products that is available within each store.
This catalogue allows you to send price updates, availability, more frequently than a Google Local products feed.
It is useful s part of the LIA program (Local Inventory Ads) in conjunction with other feeds and/or individually as part of the Ads program for your products available in shop(s).
[Access to this feed on Lengow is subject to conditions. Contact your Lengow account manager.]
Note that Google only display products with a stock higher or equal to 5 units.
How to use this option?
Its setting is similar to Google Shopping channel.
This feed is working through CSV and has to be registered in your Merchant Center.
To know more about its use within Google, please consult their help center.