Types of custom dimensions and metrics
Custom dimensions and metrics enable you to report on information about your users and how they interact with your site or app. They’re useful when the data you want to analyze isn’t available through the predefined dimensions and metrics.
Custom dimensions and metrics are built using the custom event parameters and user properties on your website or app. Only the event parameters and user properties that have been sent from your site or app and collected by Google Analytics can be used to build custom dimensions and metrics.
You can set up the following types of custom dimensions and metrics. The type you should choose depends on the type of data you want to analyze.
| Type | Details | How it works | Standard property limits | Analytics 360 property limits |
|---|---|---|---|---|
| User-scoped custom dimensions | Analyze an attribute about users on your website or app. | Defined based on a custom user property. | 25 | 100 |
| Event-scoped custom dimensions | Analyze an attribute about an event, such as the value of the event or whether the intended action was completed successfully. | Defined based on a custom event parameter. | 50 | 125 |
| Item-scoped custom dimensions | Analyze an attribute about a product or service sold on your online store. For example, you can analyze the color, size, rating, or status of a product. | Defined based on a custom event parameter within an items array. | 10 | 25 |
| Custom metrics | Analyze the data points from an event parameter. For example, you can analyze the value of a transaction from an event parameter. | Defined based on a custom event parameter. | 50 | 125 |