What is wheel alignment?
Ensuring the front wheels are aligned parrallel when driving so that the tyres are in contact with the road at right angles

In alignment the front two wheels are aligned to be parallel while driving & the rear wheels tract the front in the same line to keep the car stable during turns & high speed roll. The wheel angles are checked (castor angle & camber angle) to ensure the tyres are in contact with the road at right angles. This ensures even wear of tyres.

Recommended at least every 10,000 kms.