I think its that thumbtack tries selling you on the idea of having a website review widget or badge installed on your website. Say a a potential clients lands on your website and clicks on the thumtack widget Thumtack will rout them to your profile. Your visiting client either can send you a direct message from your thumtack profile, OR they can click on the big shiny blue "request a quote" box and get routed to hundreds of other contractors on thumtacks platform.
@AGC many pros use the widgets to showcase their Thumbtack profile to possible new customers visiting their websites. If pros have a large collection of reviews that they’re proud of, it allows them to share that! It’s also a good way to showcase Top Pro status. It’s completely up to you whether or not you’d like to use the widget or not, but a lot of pros like having that option.