A memento is a unit of knowledge that helps you remember how to successfully solve a problem or execute a task.
Each memento is tied to a category that gives them a specific structure and purpose, which makes them easier to classify, remember, and retrieve.
They can be organized accross different boards and (soon) workspaces, tailored to the projects, teams, topics or categories you desire.
Mementos help you build your programming knowledge as you learn, and make sure it is easily accessible when you need it.