This video is a lesson on how to use context clues to figure out the meaning of unknown words while reading. The teacher explains different types of context clues, such as synonym clues, antonym clues, definition clues, inference clues, and cause and effect clues. The teacher provides examples and prompts the viewer with questions to test their understanding. The video also emphasizes the importance of relying on context clues when a precise definition is not needed and encourages the use of dictionaries for more specific definitions.