I want to allow users to map TripAdvisor links with their own products so that when potential customers are on their profile, the TripAdvisor widget shows the corresponding reviews, but all the user has done is added a link to the product.
Essentially I add the plugin once, then users add links to their trip advisor pages and it shows corresponding views for each product.
Hi there, @Nick_Hugh 
You’d like to use a single widget with the flexibility to specify different sources depending on the webpage where it is placed. Am I right?
If this is the case, happy to say that this feature is available, but only for Enterprise customers. If you’d like to learn more detail, please contact Elfsight Support Team, they’ll be happy to advise 
However, if I misunderstood you, please describe your idea in more detail.