A2 Key, widely known by its former name KET (Key English Test), is the entry-level qualification in the Cambridge English Qualifications suite. It's designed for learners who can understand and use familiar everyday expressions and very basic phrases to meet concrete needs — ordering food, giving simple directions, or talking about their family and daily routine.
The exam has three papers: Reading and Writing (60 minutes), Listening (around 30 minutes), and Speaking (8–10 minutes, taken with another candidate or in a group of three). Each paper contributes to a single Cambridge Scale Score, reported on a scale from roughly 80 to 150. Unlike a simple percentage, the Cambridge Scale Score is designed to be comparable across different exam sessions and even across different Cambridge English Qualifications, which is part of why it maps cleanly onto the CEFR (Common European Framework of Reference for Languages).
The CEFR is the international standard used to describe language ability, from A1 (beginner) through C2 (proficient). A2 Key is built around the A2 level, but because scoring is reported on a continuous scale rather than a simple pass/fail, a candidate's result can land them at A1 or A2 depending on exactly where their score falls — both are recognized and reported on the official certificate.
Scoring at A2 or above on A2 Key tells a learner (or their school) that they're ready to start working toward B1 Preliminary, the next qualification up the Cambridge ladder. Many primary and secondary schools worldwide also use the Schools version of this exam as a structured checkpoint in a longer English-learning journey that starts with Cambridge's Young Learners (YLE) exams.