An AND gate is a basic digital logic gate that outputs a true signal (1) only when all of its inputs are true (1). It is commonly used in electronic circuits to perform logical conjunction, meaning it combines multiple input signals to produce a single output. If any input is false (0), the output will also be false (0). In a typical AND gate, there are usually two or more inputs. For example, if you have two inputs, A and B, the output will be true only if both A and B are true. This simple yet effective mechanism is fundamental in computer science and digital electronics.