<a href="https://deskloft.org/seattle/the-union/" title="The Union — Coworking Spaces in Seattle"><img src="https://deskloft.org/seattle/the-union/badge.svg" alt="The Union — Coworking Spaces in Seattle" 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.