Activation - how many people take the first step (signup, post comment, etc)?

Activation metrics include, mostly applicable when someone can sign up for your product without talking to sales:

• Product qualified leads (PQLs): how many people are using your product in a way that indicates they’re ready to upgrade or become paid customers.

• Lead-to-sign-up conversion rate: how many leads are signing up to use your product.

• The number of sign-ups: how many people are signing up to use your product in a given time period.

• Time from sign-up to active usage: how much time passes on average between a person signing up to use your product to meet your definition of an active user.