Filtering systems are mechanisms designed to separate unwanted elements from a mixture or stream of data. They can be found in various applications, such as water purification, air filtration, and digital data processing. By removing impurities or irrelevant information, these systems help improve quality and efficiency. In digital contexts, filtering systems often use algorithms to sort through large amounts of data, identifying and isolating specific information. For example, email filters can detect spam messages, while search engines like Google use filtering to present relevant results. These systems enhance user experience by providing cleaner, more focused outputs.