Main advantages of Multithreading are...

• 1 - Improved performance: We can improve performance of a job by Multi-threading.
• 2 - Simultaneous access to Multiple Applications: We can access multiple applications from a process by doing multithreading .
• 3 - Reduced number of Servers required: With Multithreading we need lesser number of servers, since one process can spawn multiple threads.
• 4 - Simplified Coding: In certain scenarios, it is easier to code multiple threads than managing it from same thread.