Quote:Many websites on today's Internet display content that is of no or little interest to visiting users; the content is downloaded, however, and device power and bandwidth is expended to retrieve the data.

Data, such as advertisement, widgets, or social media data, often comes from different servers which delays the display of what is important to the user.

Quote:Because of the numerous data sources and rich content of the various items, much time and bandwidth can be required to retrieve all the data prior to rendering a web page.

This translates into increased power consumption and the additional content slows down web page rendering.

Scrolling may result in additional data retrievals from sources next to that.

A recently filed Microsoft patent describes a browser plug-in designed to conserve bandwidth and power by blocking, moving, or redirecting irrelevant content from websites.

What is considered interesting and what is not should be decided by the user of the browser according to Microsoft. Users could define interesting and uninteresting items to provide the plugin with the required information to load, block, or delay content.

Full reading: https://www.ghacks.net/2019/02/04/microsoft-browser-patent-to-deal-irrelevant-content/