Google Analytics has launched the aptitude to course of item-specific customized parameters from ecommerce occasions occurring in your web site or app. These parameters may be registered as customized dimensions and utilized in exploratory evaluation.
What they do. Customized parameters on an item-level grant you the chance to assemble extra knowledge about merchandise in your web site or app, extending past the usual parameters supplied by default. As an illustration, item-specific customized parameters may be employed to acquire details about a product’s colour, dimension, buyer score, and availability standing.
The way it works. When establishing a customized dimension or metric, you want to provide the identify of the customized occasion parameter or customized consumer property that Analytics will hyperlink to the brand new dimension or metric. Subsequently, Analytics fills the newly created dimension or metric with values gathered from the respective occasion parameter or consumer property.
Greatest practices. Previous to creating customized dimensions and metrics, Google recommends using the default dimensions and metrics.

For advertisers with a regular property, chorus from producing extreme high-cardinality customized dimensions, as they’ll adversely have an effect on your experiences and result in knowledge aggregation beneath the (different) row.
Moreover, it’s not thought-about greatest observe to register a customized dimension for a parameter already outlined as a dimension, reminiscent of web page and display dimensions or transaction ID. Whereas this received’t affect cardinality, it’ll eat a part of your customized dimension quota.
Limits. Google means that for those who attain the next limits, to archive those you don’t use and create new ones.

Dig deeper. To learn to archive or arrange customized dimensions, go to the Analytics Assist information.
Why we care. Customized dimensions and metrics present beneficial insights that may improve advert marketing campaign efficiency, enhance concentrating on, and in the end enhance return on funding (ROI).