Gmail has now officially supported for Signatures which can contain links, images and almost anything by adding Rich Text Support to the signature settings which is available in your account settings.Though you don’t get to add HTML codes directly into it.
Apart from this you can have different email signature for email addresses you have added to your account. This is similar to what we have in Outlook Also.
This is really nice feature added by Gmail team
Earlier I used to use Wisestamp which is a great addon for the same. Though I believe using different signature for multiple account is going to be super handy for many.
Have you used Wisestamp? Which one you would suggest/ WiseStamp or this official Gmail signature?