Card sorting is a user-centred design technique used to understand how people categorise and organise information. It involves presenting a set of information or items on individual cards and asking users to sort them into categories that make sense to them.

A/B testing is a method of comparing two versions of a webpage, app, or marketing campaign to determine which version performs better. In A/B testing, two versions of a page or campaign are shown to two different groups of users, with one group seeing version A and the other group seeing version B. The results are then compared to determine which version performs better based on a specific goal, such as click-through rates, conversion rates, or revenue.

Analytics refers to the use of data analysis techniques, statistical models, and machine learning algorithms to extract insights and knowledge from data. The goal of analytics is to gain a deeper understanding of complex data sets and to use this understanding to make data-driven decisions.

Task analysis is a method that can be used in various stages of product and service design, research, exploration, and experimentation. It involves breaking down a task or process into smaller steps and analysing each step to identify potential opportunities for improvement.