A shopper asks your Helpie assistant, "is this any good for sensitive skin?" If you have switched it on, Helpie can answer from your actual reviews and testimonials, in your customers’ own words, rather than only from the copy you wrote.
Trustie testimonials and WooCommerce product reviews can each be added as sources the assistant reads. They stay off until you turn them on, because reviews change the character of the assistant: leave them off and it answers purely from what you published; turn them on and "what do people say about this?" gets a real answer, grounded in the review and cited back to it.
Why it’s worth having
The most persuasive words about your product are the ones your customers wrote. This lets the assistant reach for them at the moment a shopper is wavering, instead of leaving that social proof sitting on a reviews tab they might never scroll to.