<a href="https://vowsmith.org/austin/blue-nile/" title="Blue Nile — Custom engagement rings in Austin"><img src="https://vowsmith.org/austin/blue-nile/badge.svg" alt="Blue Nile — Custom engagement rings in Austin" width="300" height="84"></a>

Paste it into your website — most site builders (Wix, Squarespace, WordPress) have an "embed code" or "custom HTML" block. The footer is a good spot.