<a href="https://retireo.org/san-francisco/heritage-on-the-marina/" title="Heritage on the Marina — retirement communities in San Francisco"><img src="https://retireo.org/san-francisco/heritage-on-the-marina/badge.svg" alt="Heritage on the Marina — retirement communities in San Francisco" 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.