What is pipelining hazards?

Pipelining hazards are issues that occur in a pipelined processor when the next instruction cannot execute in the following clock cycle, leading to delays. There are three main types of hazards: structural hazards, where hardware resources are insufficient; data hazards, arising from dependencies between instructions; and control hazards, which happen due to branch instructions affecting the flow of execution. These hazards can impact performance by causing stalls or requiring additional mechanisms to manage instruction flow effectively.