The other account is linked to your Gmail account, and you can now send and receive emails from that account through Gmail. Review the requested permissions and click Yes.Enter your other account's password, then click Sign In.Choose whether to link accounts or import emails, then click Next.Here, you can either link the account or simply import email from the other account into your Gmail inbox and not enable the other features of linking. Enter your other account's email address, then click Next.
Grant access to your account gives another Gmail user limited access to your mail.Check mail from other accounts links another mail account to Gmail, allowing you to check mail from that account from within Gmail.Send mail as allows you to send mail from Gmail using another email address.This settings screen has a few options that sound similar, that all allow you to use another email account in different ways. While not all email accounts are supported, most common webmail providers can be added to Gmail. This allows you to see messages from both accounts together, as well as use Gmail's sorting and searching options. If you have another email account on a service that Gmail supports, you can use that email account inside Gmail.