Storefront Widget is a feature which helps you to analyze seller's storefront by showing you the most essential information.
On the top part you will see:
Seller (country of registration, total ASIN count, rating, and review count)
Brands (shown max 10 brands, with ASIN counts for each brand. The total number of ASINs also includes ASINs of different variations of the product)
Categories (shown max 10 categories, with ASIN counts for each category, sorted from the highest ASIN count to the lowest)
The seller information looks like this in a condensed form:
The seller's detailed information looks like this:
Next to each product you can see:
ASIN
brand
UPC/EAN
size
alerts
like/dislike
restrictions (lock icon)
number of FBA/FBM offers
BSR
TOP ranking (%)
category
estimated sales
BEP (breakeven point)
store price
BuyBox price
Moreover, if you want to check another product in the Side Panel, you can easily do it without loosing downloaded data.