By connecting a Yahoo! to your Facebook account, you can reproduce your Yahoo! effectively. To do this, you need to go to your Yahoo! account settings. on a desktop computer. Since October 2016, you cannot link your Facebook account with your Yahoo! via the Yahoo! mobile app.
Step
Step 1. Go to the Yahoo
. If you're not logged into your account, type in your username and password to access your email account.
Step 2. Click Mail
It's in the upper-right corner of the Yahoo! page.
Step 3. Click the settings menu icon or “Settings” (gear button)
You can find it in the top right corner of the Yahoo! inbox page.
Step 4. Click Settings
Step 5. Click Accounts
Step 6. Click “Connect” next to the Facebook option
You will be asked to log into your Facebook account first if you haven't already.
Step 7. Click Continue as [Your Name]
Step 8. Click OK
Now, Yahoo! and your Facebook is connected!