A "Sentinel" is often described as a guard or watchman, someone who keeps a lookout for potential dangers or threats. In various contexts, such as in nature or technology, sentinels play a crucial role in monitoring and protecting their surroundings. For example, in the animal kingdom, certain birds act as sentinels, alerting their flock to predators. In the realm of technology, a sentinel can refer to software or systems designed to monitor and protect data. These digital sentinels help detect unusual activities, ensuring the safety of information. Just like a vigilant guard, they work tirelessly to keep threats at bay, safeguarding valuable resources.