This is the broad, overarching goal of a project or research. It defines what you ultimately want to achieve. Your SP aim might be “​To enhance the cybersecurity resilience of SMEs by developing a mission appropriate cybersecurity framework by December 2026"
It is important that the Aim is a natural progression from the Title and clearly supported by the suite of objectives. The Aim should not be a repeat of what you are planning to do, rather: why your "knowledge" adds to canon or how your findings will be applied in the workplace.