What is the relationship between fishing line weight and fishing?

Because different fishing occasions have different requirements for fishing lines, the weight of fishing lines is also different. In order to make the fishing line better adapt to different occasions, manufacturers will add different material components when manufacturing the fishing line, resulting in different specific gravity of the fishing line. Typical, like hollow fishing line, the specific gravity is less than 1, and the fishing line floats on the water surface for visual recognition, which is generally used for pumice fishing. Some fishing lines have carbon and resin added.