Quicksort is a popular sorting algorithm that uses a divide-and-conquer approach to arrange elements in a list. It works by selecting a 'pivot' element from the array and partitioning the other elements into two sub-arrays: those less than the pivot and those greater than the pivot. This process is repeated recursively for the sub-arrays until the entire list is sorted. One of the key advantages of Quicksort is its efficiency, especially for large datasets. On average, it has a time complexity of O(n log n), making it faster than other sorting algorithms like Bubble Sort or Insertion Sort. However, its worst-case performance can degrade to O(n²) if not implemented with care.