What are crypto candlesticks & how do they work?

In the realm of cryptocurrency trading, a common tool utilized by analysts and traders is the crypto candlestick chart. Could you elaborate on what these candlesticks represent and how they function in the analysis of market trends? Specifically, I'm interested in understanding the composition of a candlestick, its various parts, and how they reflect price movements within a given timeframe. Additionally, how are candlesticks interpreted to identify potential buying or selling opportunities? Clarifying these aspects would greatly aid in my comprehension of this crucial analytical tool in the world of cryptocurrency trading.