In RepU, open your widget, choose light or dark and left or right, then click Copy next to the embed snippet.
In B12, go to Website, then Settings, then Sitewide integrations. Click Add new, choose Custom footer script, paste your code, and click Add integration.
Need more detail? See the official B12 guide.
Click Publish, then open your live site to see your Google reviews.
Check your live site in a private window, not the editor or preview. A domain-locked widget only shows on your own domain.
Make sure you chose Custom footer script, not Head tag. Sitewide integrations need the Basic plan or higher.