It appears to be a human verification step, not content to summarize. However, I will describe the situation:
The website or platform is attempting to verify that you are a human visitor and not a bot. They want to ensure that you’re a real person, and not an automated program or script trying to interact with their content. To verify this, they’ve presented you with a simple visual task: pressing and holding a button until it turns green. This is a common technique to distinguish between human and non-human traffic.