An idea or concept gets encapsulated when we put all its key parts together into one clear and simple package. Think of a summary that includes everything important about it.
When someone says they've managed to encapsulate something, like the main points of a huge project, what they usually mean is that they've taken all those tiny details and organized them into one neat container, so you can easily understand them. This might be in writing - a concise report, for example - or even just explaining it to someone else in a clear way.
(transitive) To enclose something in, or as if in, a capsule.
