This site shows a 4.7 average rating next to three featured quotes.
The rating sits beside the quotes and the 30-90 days stat. No review platform, review count or method is linked.
The three featured quotes carry 5, 5 and 4 stars, which average about 4.67, rounding to 4.7. So the figure is consistent with those three, but the page does not say how many reviews it reflects. Read it as brand-stated.