The sequence "0, 1, 2, 3, ..." represents the set of non-negative integers, which are fundamental in mathematics. These numbers are used for counting and ordering. The number 0 signifies the absence of quantity, while 1 is the first positive integer, representing a single unit. As we continue through the sequence, each number increases by one, forming a pattern known as counting numbers. This series is essential in various fields, including computer science, statistics, and everyday activities like shopping or timekeeping. Understanding this sequence is crucial for basic arithmetic and mathematical concepts.