There are multiple reasons why analyzing your GraphQL Schema's usage is beneficial, including optimizing the API to better suit clients' needs, improving documentation, and safely removing or deprecating unused fields. Implementing schema usage analytics involves dividing the process into three parts: response type field usage, field arguments usage, and input type field usage analysis. By analyzing these aspects, you can gain insights into how your GraphQL Schema is being used and use this information to implement breaking change detection, ensuring that changes do not break existing clients.