You can set the frequency of how often this policy appears and then expires for your audience:
The "Never expires" option means the policy will appear every single time your chosen audience signs-in. Meaning, even if I accepted or acknowledge the policy during my visit yesterday, I will see it again during my visit today.
The "Every visit" option means this policy will only appear once for your chosen audience. Once a response is received, the policy will not be included in the subsequent sign-in process.
If any of the other options (30 days, 90 days, 1 year) are selected, the user should see the policy 30, 90 or 365 days from when they first accepted the policy (for ex: If I signed in and agreed to a 1 year policy on Aug 4 2025, I would see the policy again if I signed in 365 days later)