> For the complete documentation index, see [llms.txt](https://www.zerabooks.com/help/llms.txt).

# Vendors, Customers & Products

The people you pay, the people who pay you, and what you sell.

- [The Vendors and Customers pages](https://www.zerabooks.com/help/vendors-customers-and-products/vendors-and-customers-pages): See everyone you pay and everyone who pays you, with their activity for the period, what's still owed, and every transaction behind the totals.
- [Add, edit, deactivate or merge a vendor or customer](https://www.zerabooks.com/help/vendors-customers-and-products/manage-vendors-and-customers): Create a vendor or customer before their first bill or invoice, keep their details current, stop offering one you no longer use, and merge duplicates.
- [Link bank descriptions to saved vendors](https://www.zerabooks.com/help/vendors-customers-and-products/link-bank-descriptions-to-vendors): Put bank transactions under the vendor they belong to. ZeraBooks suggests links it's sure of, and every similar transaction in every month follows.
- [Recategorize a vendor's transactions](https://www.zerabooks.com/help/vendors-customers-and-products/recategorize-a-vendors-transactions): Move many of a vendor's bank transactions to a new category at once from the Vendors page, or fix one transaction and apply it to similar ones.
- [Create a product or service](https://www.zerabooks.com/help/vendors-customers-and-products/create-a-product-or-service): Save what you sell or buy once, with its price and category, and every invoice or bill line that uses it fills itself in.
- [Variants and groups](https://www.zerabooks.com/help/vendors-customers-and-products/variants-and-groups): Sell one product in several sizes or versions with variants, and organize your catalog into groups with their own icon and color.