Paste the code to you Tilda website’s HTML field.
Next, go to your Tilda website and find the HTML field. It is most likely in the form of an HTML/Code widget or module which you can find on Tilda’s dashboard. Add it to your page, and paste the code you’ve copied before to the HTML field. Save and update, and that’s it, you should have Common Ninja’s Mastodon Feed widget on your Tilda website.