Updating Inventory In Combinations For 3Rd Storefront

Hi. I have shared 1 product with Option and Combinations (different sizes) from store 1 to store 2. What happens with inventory update? I mean if I update inventory for that product in store 1 will it share in store 2 for the same product and combinations?

How this works for shared products between storefronts?

Also what happens when I change the title text of product in store 1. Does it automatically apply in store 2?