Open Gmail and sign in to your account
Click the Settings gear icon in the top right
Select See all settings
Scroll down to the Signature section
Click Create new
Enter a name for your signature
Click Create
Type your email signature in the editor
Format the text if needed
Add links, images, or contact details if desired
Choose the signature defaults for new emails and replies/forwards
Scroll down and click Save Changes
Compose a new email to confirm the signature appears