It is a mechanism which involves more than one components to work parallel with Each other.
Generally in Test Automation, we have two components
1. Application Under Test
2. Test Automation Tool.
Both these components will have their own speed. We should write our scripts in such a way that both the components should move with same and desired speed, so that we will not encounter "Element Not Found" errors which will consume time again in debugging.
Synchronization can be classified into two categories: