Pagination as Name Suggest Divides Content On-single pages in Multiple pages or Use Content in Segment with Different pages . When their is pool of Data The paging is Required to Show off within a number of pages . This Helps to Reduce Server load . This Can be of two kinds
One Paginated Lists: used when we split a large list into several pages
And other Paginated Content: content or article is segmented into several different pages .
Yes Pagination is Good Alternative to Scrolling .