• SaveChanges(): Synchronous method that blocks the calling thread until database operations complete
• SaveChangesAsync(): Asynchronous method that doesn't block the calling thread, returns Task<int>

// Synchronous
int changesCount = context.SaveChanges();
// Asynchronous
int changesCount = await context.SaveChangesAsync();

Benefits of async:

• Better scalability in web applications
• Doesn't block threads during I/O operations
• Improves application responsiveness
• Essential for high-traffic applications