In growth metrics, "activation rate" measures the percentage of new users who complete key onboarding actions that indicate they've experienced the product's core value.
An activation rate that falls in a lower percentage range, maybe for most companies five to 15%, is better than one that falls in a higher percentage range because it means that there's likely much higher correlation with long-term retention and you're really working hard to get most of your users to reach a state that they're not reaching today.