The two main channels of communication are formal communication and informal communication. Formal channels involve communicating via standards that the organization defines. Using formal communication helps you adhere to professional standards and respect hierarchical structures to ensure the efficient transmission of messages. Examples of formal communication include reports, legal notices and newsletters. Informal channels are more casual and allow members of an organization to communicate quickly. Informal communication is more spontaneous and encourages employees to build relationships and share their ideas and concerns. Examples of informal communication include social posts, group chat platforms and phone calls.