If your Academy Admin has enabled self-assessments for you, then through them you will be able to evaluate yourself both in your required skills and the available Academy Skills. The Perception Gap will then help you better understand the gap between how you evaluate yourself on certain skills and how differently you were assessed by your managers.
Learn how to complete a self-assessment here: Completing the Self Assessment as a Regular User
To find the Perception Gap, go the the Learner Workspace and select My Dashboard -> Skills on the left navigation panel, and select Perception Gap in the top navigation.
Zero gap means that both your manager and you agree completely on your performance. A negative perception gap means your manager has assessed you more austere than you yourself and positive means the opposite.