This site has always knows for its different contents. There are so many different categories to choose from, making it hard for people to decide what to click on. And there are always different advertisements or promotions being offered through out the site. Users mostly end up scrolling for hours because of the new exciting topics being posted every minute from a variety of pages/accounts/channels.
Samsung has pages that only display white spaces area between the elements on a their web page, making it easy to navigate and easily to differenciate between different contents. From the top to the bottom is mostly white space with little wordings, which makes it pop out and straight to point of what the webpage is trying to display.
Youtube is a website filled with all types of videos. But yet at the same time, those videos will have a similar design elements and making them come together as a cohesive whole. This type of algorithsm can help users navigate through contents of the same kind. So that this way, it keeps the users/watchers stay on their website for a longer period of time.