Session recordings are renderings of individual users' experiences and interactions with your website or product. They give you a peek over your users' shoulders, showing you mouse movements, clicks, and how users navigate from page to page.
Analyzing session recordings helps you identify where people are hesitating or getting stuck—which can often be indicated by rage clicks or u-turns.
Try this: identify low-converting pages with a traditional web analytics tool like Google Analytics, then watch session recordings to see how users experience and interact on the page, and look for blockers or UX issues that are causing users to exit before converting.
When you place yourself in your users' shoes (or in front of their screen, in this case), you can understand their experience—and how to improve it to increase conversions.