By asking for feedback on your website, you can learn more about your website's visitor's expectations. You can also find out how they perceive the content of your website and your business offer.
Website surveys can gather quantitative feedback - if you ask for a Net Promoter Score (NPS), about Customer Satisfaction (CSAT), or for a Customer Effort Score (CES).
But, most of all, website surveys are a great way to gather qualitative feedback. They provide you with information you won't otherwise obtain from web analytics data. Choose a great website feedback tool for best results.