In RepU, open your widget, choose light or dark and left or right, then click Copy next to the embed snippet.
In Lightspeed eCom, go to Design, then Advanced, and click Edit code. Open your footer template and paste your code at the end.
Click Save, then open your live store 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.
Editing theme code stops automatic theme updates. Check you saved the footer template and cleared your browser cache.