Oral communication refers to expressing information or ideas through spoken words. It has several advantages, such as allowing for high understanding, flexibility, quick decision-making, and problem resolution. However, it also has disadvantages like being less formal than written communication and risking misunderstandings. Effective oral communication requires clear pronunciation, brevity, precision, and logical sequencing. Common types of oral communication include face-to-face interactions, video conferencing, telephone calls, interviews, group discussions, presentations, and grapevine gossip.