How to manage multiple email accounts in a single Gmail inbox

Here are the steps to add another Gmail/GWS account to your main google account:

To add a mail account click on the 'Add a mail account ' option next to 'check mail from other accounts '

• Make sure POP is enabled in the source account 
• Make sure the less secure app is turned on in the source account.
• If the less secure apps option is not available, enable 2-step verification and generate an app password, use the app password instead of the password.

• Username - source mail id (replace abc@xyz.com in the screenshot with your source email id)
• If less secure apps is enabled: Password - source mail-id password  
• If 2SV is enabled:  Password - App Password
• Pop server: Pop.gmail.com
• Port: 995 (preferred)
• Always use a secure connection (SSL) - Tick mark if you want to use a secure connection.
• Label incoming messages- Select if required.
• Archive incoming messages (Skip the Inbox)- Select if required