In Uccelerate we have provided you with an example definition for an index. It can be found in your App_Code folder, too hook it up you can simply add this to your Custom.config in Ucommerce:
service="Ucommerce.Search.IIndexDefinition`1[[Ucommerce.Search.Models.Product, Ucommerce.Search]], Ucommerce.Search"
For more info about index definitions please visit the Ucommerce documentation https://docs.ucommerce.net/ucommerce/v9.0/Search-and-indexing/IndexDefinitions.html.
In Uccelerate we have prepared a few features that are optional and you need to add some fields to your product definition to be able to use them.
Image Picker Multi Select
ExtraImages will show more images on the product page.
Here you can add how many products you have in stock or just use 1 or 0 to toggle out of stock message on the product.
With this you can point toward a GlobalContent block so you can show content widgets on your productpages.