What counts as an event, and how do I send data to Amplitude?

An event is an action that a user takes in your product, like ‘Create account’, ‘Add to cart’, or ‘Share photo’. It could also be an event that occurs in your product without user action like ‘Verification completed’. You can also attach custom properties to an event. You can send Amplitude events via our SDKs (iOS, Android, Javascript, Unity), server-side using our HTTPS API, or ETL partners like Segment and mParticle.