Drift is caused by oversteer where the car’s straight-line momentum overrules the car’s attempt to turn and the car slides, or drifts, across the track. In F1 this is typically very slight and corrected by the driver’s lightning-fast reflexes, also known as a snap. 

While drifting is allowed in F1, it is not desirable as it is essentially a loss of control and will come at a time cost. Or worse it could send the car off the track and into the barriers

Andrew Burden

The author Kiwi F1 Fan