Adding Yahoo Mail to your Gmail account manually involves a few steps. Firstly, log in to your Gmail account and click on the gear icon in the upper-right corner. Select "See all settings" and navigate to the "Accounts and Import" tab. In the "Check mail from other accounts" section, click on "Add a mail account" and enter your Yahoo email address. Choose the option to import emails from your Yahoo account and follow the prompts to complete the setup.

While the manual method is straightforward, challenges may arise during the process. One common issue is the need to enable "Allow apps that use less secure sign-in" in your Yahoo account settings. This step is essential for Gmail to access your Yahoo emails. Additionally, manual configuration might be tricky for users unfamiliar with email settings.

If the manual method proves challenging, consider using the Cigati Yahoo Backup Tool. This user-friendly tool streamlines the process, ensuring a smooth transfer of your Yahoo emails to Gmail without the need for manual configurations.