HTML CSS Email marketing?

Does anyone know about using HTML and CSS for marketing?
What kind of code could be used??
I don’t know…

I’m a little late with my answer, but hope it will be helpful.

As for HTML in your email campaigns, you can use different HTML editors embedded in marketing automation systems like eSputnik, for example, or MailChimp. As a rule, such systems include different ready-to-use HTML templates for your emails, newsletters, buttons etc.

Here are a few good articles on this topic: