In this video tutorial, viewers learn how to unzip and zip files. The ZIP file format is a data compression and archive format. To unzip a file, right click on the file and select "Extract All". Continue by pressing "Next" and wait for the file to extract. To zip a file, right click on the file, select "Send To" and click on "Compressed (zipped)" folder. This video contains voice narration and a visual demonstration for viewers to easily understand and follow along. This video will benefit those viewers who want to learn how to open ZIP files and how to compress files to a smaller size.