|Apex code is the Force.com programming language used to write custom, robust business logic. Apex is compiled and executed on the Force.com multi-tenant infrastructure, which is a shared resource across all customers, partners, and developers. Consequently, it's important that Apex code developed by individuals don't use excess resource in multi-tenant architecture. Each organization is allocated with a good amount of resource and features which should be well governed by the executing code. Most of the governor limits are static or constant which cannot be changed.