If you wish to add a Twitter button to your website, you can use one of our pre-made Twitter "Link" buttons. These will open up your Twitter page in a new tab.
You can find these, along with some step-by-step instructions on how to add them to your website, here:
If you need any assistance with adding HTML fragments to your site, please take a look at the following guide:
Don't forget to check out Create on Twitter too.