Custom Dimensions are useful to track any information related to any action or visitors. Here are some more information about the data limits in use:
- Up to 5 Custom Dimensions in scope “Action” and 5 Custom Dimensions in scope “Visit” can be used by default for each website. A higher number of custom dimensions can be made available by changing the schema of the database (schema changes can be slow depending on the size of the database). [Learn more.] You can typically increase the limit and track up to 50 dimensions in each website.
- Each value is limited to a length of 255 characters in length
- Learn more about the Data Limits in Matomo (Piwik)