Hi, I would like to add a picture or better said, a logo in my email signature in Gmail.
Click on the cog-icon and click on Settings. Scroll down all the way to “Signature” and click on the button “No Signature” and fill out the form with your information, in case you don’t have a signature yet.
Postion the cursor where you would like to insert the picture or logo and click in the menu bar on the “Insert picture” icon. Choose the URL and the picture and insert it.
Then scroll all the way down and klick on “Save changes”. Now you will see your signature in every new email message you will create.
You can also watchour short video to learn how to do it.
Please find more about G Suite in general on this page.