Card Sorting is a UX research technique used to evaluate or generate ideas for the information architecture of a product or service.
Types of Card Sorting
Remote vs. in-person
Open vs. Closed
Moderated vs. Unmoderated
How to conduct a card sort
Create a list of topics
Shuffle the cards and ask the user to sort them into piles
Ask the user to label each pile
Analysis
After carrying out the exercise with at least five users, analyze your results with these questions:
What common groups did your users come up with?
Which cards were frequently paired together?
Tips and best practices
Brief the user on what's about to happen
Use a maximum of forty cards
Shuffle the cards for each card-sorting session
References
"How To Do Card Sorting In UX Design
"Card Sorting Technique: Planning a website