How to forward emails to some other email ID?

If you need to forward emails to some other address, then you need to follow the below steps.

Login to the gmail interface of the person whose emails need to be forwarded.
Go to settings by clicking on the gear icon as shown below and selecting settings from the drop-down menu.
Go to Forwarding and POP/IMAP tab --> Add a forwarding address and enter the email address where you want the emails to be forwarded. Then click on Proceed on the confirmation pop-up as shown below.
Then select Forward a copy of incoming mail to and Choose the email address which you just added as shown in the picture below.
Scroll down and Click on Save Changes for the settings to take effect.