Get to know how your visitors are feeling while browsing your main landing page or subpages like about, pricing or contact.
Get insights into what are your customers feelings about your SaaS product or where they could get stuck. You can show a widget i.e. in the dashboards.
Good documentation is a foundation for a good app. Ask users if it's easy to find information they are looking for.
Adjust content of the blog to visitors needs. You will know what topics are the most demanded.
Let customers share if they can find products to buy, rate checkout or support in your shop.