How to add HTML scripts (and meta tags) like ProveSource, Facebook Pixel, Google Analytics or Beamer to your Bubble App: (This is a repost of @BassLab’s post)
You need to go to the settings tab in your editor (on the left hand side menu), then click on the SEO / Metatags (found at the top).
And from there you are able to input scripts/meta tags in the header, also script in the body.