Sequential execution refers to the process of executing instructions or tasks one after another in a specific order. This method ensures that each step is completed before moving on to the next, making it straightforward and easy to follow. It is commonly used in programming, where code is executed line by line, allowing for predictable outcomes. In contrast to parallel execution, where multiple tasks run simultaneously, sequential execution can be simpler to manage. However, it may be less efficient for complex tasks that could benefit from multitasking. Overall, sequential execution is fundamental in various fields, including computer science and project management.