Oh my gosh, I guess it wasn’t showing in my preview but was actually working! Thank you so much for your help!
1. I am using the custom HTML widget
Here is a link to my site. The code should be displaying the add on the right side below my other sidebar widgets
https://plantpoweredbabe.com/
<a href="https://xeroshoes.com/go/plantpoweredbabe/2acdffd8" target="_top" rel="noopener noreferrer"><img src="//xeroshoes.postaffiliatepro.com/accounts/default1/7xa5374bd/2acdffd8.gif" alt="Barefoot inspired minimalist zero drop shoes and sandals from Xero Shoes" width="300" height="250" /></a>
