<a href="https://microglow.org/boston/medical-aesthetics-on-tremont/" title="Medical Aesthetics on Tremont — microneedling treatments in Boston"><img src="https://microglow.org/boston/medical-aesthetics-on-tremont/badge.svg" alt="Medical Aesthetics on Tremont — microneedling treatments in Boston" 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.