What is Card Sorting?
Card Sorting is a user-centered research method used to inform the design of the information architecture of a site. In a card-sorting session, participants organize topics into categories that make sense to them and they can also help you label these groups. To sort cards, you can use an actual card, a piece of paper, or one of the many online card-sorting software tools.
Card sorting involves 'sorting' user cards into the groups that matter most to them. The goal is to understand how users view a group of given items and identify possible categories. The patterns that arise can help inform menu items in a website's navigation, or what information should be added, combined, or removed.
There are two different types of card sorting: an open or closed card sort. It is a technique to check how users are grouped. Users are given a set of cards with different item names and asked to sort them into respective piles and label the groups. Card-sorting technique provides insight into the customer’s mental models of information structures and placement of items on a Website.