A timeline is a visual representation that displays a sequence of events in chronological order. It helps people understand the relationship between different events and how they unfold over time. Timelines can be used in various fields, such as history, project management, and education, to illustrate important milestones and deadlines. Timelines can be simple, like a line with dates marked along it, or more complex, including images and descriptions of events. They are useful tools for organizing information, making it easier to grasp the progression of events related to a specific topic, such as the life of Albert Einstein or the development of the internet.