Agency review cycles run on ambiguity. A client emails "the header looks off on mobile", nobody knows which page or which device, and two replies are spent establishing what everyone is looking at.
A widget on the site removes the ambiguity at the source. The report carries the URL, the viewport, and the browser, because it was written from the page in question.
One project per client site
Each client gets their own project, their own allowed origins, and their own destination. Nothing crosses over, and a client can never see another client's reports.
Match the client's brand
Set the accent colour and the launcher label per project. The widget renders in a Shadow DOM, so it looks identical regardless of what the client's theme does to buttons and inputs.
Route to where your team works
Send one client's feedback into a GitHub repository and another's into a Jira project. Labels and assignees are set per integration, so client work lands pre-sorted.