Local Metrics are metrics that are scoped to an individual experiment. They let you create the exact specific custom metric you want to measure in the context of your experiment or gate, without having to clutter up your Metrics Catalog on an ongoing basis.
Local Metrics can be created from the Setup tab sections of your entity, will be calculated for the duration of your experiment or rollout, and then will cease to exist when you make a decision on your experiment.
This rolled out on Statsig Cloud recently, and is now available on Statsig Warehouse Native too.