What role does Squealer play in Animal Farm?

Squealer represents the Propaganda newspaper Pravda rather than a person the way the other pigs in the novel do. The statement that Squealer can turn black into white was intended to refer to Pravda's ability to turn lies into truth. Squealer also carries the messages from Napoleon to the other pigs who simply take what Squealer says for gospel. In other Words, Squealer is a method of communication from the top to the bottom with the ability to put the proper spin on the information. That was Pravda.