We often work with web applications that need to fetch large amounts of data from a server through APIs and render it on the screen.
For example, in a Social media application we fetch and render users' posts and comments. In an HR dashboard we display information about candidates who applied for a job. And in an Email Client we show the a user's emails.
Rendering all the data at once on the screen can cause your webpage to slow down considerably because of the large number of DOM elements present in the webpage.
If we want to optimize on performance we can adopt various techniques to render data in a more efficient manner. Some of these methods include infinite scroll with virtualization and pagination.