# Custom fields

Custom Fields can be assigned to Assets and are generally helpful for organizing and searching Assets within a Brandfolder, as well as for understanding more details about each Asset.

Each Custom Field is essentially a key/value pair associated with **exactly one Asset**. Keys and values are always a string type, so use `"123"` instead of `123`.

For example, if you have several Assets that represent products you sell in different colors, you might create a Custom Field for each of those Assets with a key of `"color"` and a value of `"blue"` or `"red"`, etc. If you modify or delete a `"color":"blue"` Custom Field for any particular Asset, it will not affect other Custom Fields on other Assets, even if they have the same key and/or value.

> **IMPORTANT:** Think carefully about whether Tags or Custom Fields are better suited to meet the needs of your particular use case.