A Mollifier is a mathematical function used to smooth other functions through convolution, resulting in smoother outputs. It is particularly effective when convolving with step functions, transforming them into continuous functions that are constant within compact sets and zero outside small neighborhoods. While the concept is straightforward, its practical applications may not be immediately apparent to everyone. The discussion encourages seeking clarification on specific aspects of the topic for better understanding. Overall, Mollifiers serve as useful tools in analysis for creating smoother functions from less regular ones.