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.][2] 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)
Previous FAQ: How do I use Extractions to track action data with Custom Dimensions?