📚User stories are short, simple statements told from the perspective of a user, explaining how they will use a system.
🔍Product backlog is a list of things to add or improve in a product, and each item is a product backlog item (PBI).
💡Epics are big user stories, describing a significant functionality or feature.
🎯Themes are groups of related user stories, usually with a common goal or objective.
🔧Features are product backlog items that are big enough to be released to users.