Visitors should not have to hunt for a choice. Make it easy to accept, decline or pick cookie groups. Give them a way to change their mind later, too.
Label the buttons clearly
Use words that match the action. Accept all allows optional groups. Reject all keeps optional groups off in an opt-in setup. Manage preferences opens the available groups. The site should still let visitors read your cookie information.
Test one group at a time
Allow Analytics while keeping Marketing off. Check the relevant network requests. If both tools run, investigate their setup rather than changing the banner's color or wording.
Then test the opposite choice where your configuration allows it. Check a fresh visit separately from a saved choice. Do not clear a real visitor's preferences as part of routine testing.
Remember the choice
Reload after saving. Check that the same browser keeps a valid choice and the notice does not ask again without a reason. Do not promise that a choice carries across devices or browsers.
Let visitors change their minds
Open preferences again, remove Analytics, and save. Check future requests. Some tools need their own shutdown steps or a page reload after withdrawal. A consent update cannot recall data already sent.
Keep the record in context
Look for the saved choice in your dashboard. Record the test time and page. Avoid claiming that a timestamp alone proves every script behaved correctly.
Follow the installation steps, then work through the audit checklist.