Refresh in computing refers to the action of clearing part or all of a computer screen and redrawing it. It is commonly used to resolve issues such as web pages 'hanging' or not loading properly.
Surfing refers to the act of casually browsing or exploring the World Wide Web, typically without a specific goal in mind. The term is analogous to 'channel surfing' with a TV remote control, where a person flips through TV channels looking for something interesting to watch.
