What is high frequency trading in layman terms?

A type of trading where computer algorithms are used to analyze market and market trends is known as high-frequency trading. It is mostly about making trades on the basis of ever-changing trends in the market at a very high speed. Generally, these trades are made using algorithms in fractions of a second with the aim of making money in small changes. High-frequency trading is used by financial institutions, hedge funds, and big investors to get an edge in the market and make money.