How do I confirm if my MongoDB Atlas connection string is correctly configured and not the source of the connection problem?

To confirm your connection string, go to your cluster overview in MongoDB Atlas, click the 'Connect' button, then select 'Connect your application'. Choose your driver version and copy the provided connection string. Carefully compare this string with the one used in your application code. Common mistakes include incorrect database user, a misspelled cluster name, special characters in the password that need URL encoding, or missing crucial parameters like `retryWrites=true&w=majority`.