The DELF B1 exam is a French language certification that assesses proficiency through four skills: speaking, listening, reading, and writing, and it is a requirement for various opportunities, including permanent residency in France. The exam format has recently changed, particularly for the listening and reading modules, with multiple-choice questions replacing open-ended ones, although the new format's implementation may vary by location. Preparation strategies include practicing specific tasks in each module, revising grammar and vocabulary, and using rough sheets for planning and drafting responses.