Chicane is a section of the race track with corners in different directions. This section is placed in order to slow down the cars after high speed. The photo below has chicanes.
Chicanes in F1 are different from circuit to circuit. Some F1 tracks have multiple chicanes and some don’t have chicanes at all. Monaco, Canada, and France feature multiple chicanes whereas Bahrain and Abu Dhabi do not feature any chicanes.
How a driver handles chicane might determine how he will come out at the end of the race. It is a crucial section of the track. Often drivers sacrifice the first corner and get high speed on the second one. However, every chicane is different and drivers’ strategy varies.