How does LSB steganography hide data in PNG images without being noticeable to the human eye?

LSB steganography modifies the least significant bit of each RGB color component in a PNG pixel. Since each color component ranges from 0 to 255 and the human eye can only distinguish about 10 million colors, changing the least significant bit (which alters the color by at most 1) is imperceptible. Each pixel can carry 3 bits of data (one per color channel). This technique is commonly used in tools like cloacked-pixel.