To
add a member on Spotify, navigate to your account settings and locate the "Family" or "Premium Duo" section. Click on "Add Member" and enter the email address of the person you wish to invite. They will receive an email with a link to join your plan. Once they accept the invitation, they will become a member of your Spotify subscription. This feature allows you to share the benefits of your plan, such as ad-free listening and offline downloads, with your family or friends, enhancing their music streaming experience.