The diagnostic tools are used to precise wheel alignment specifications.
If you need an alignment, make front-end or rear-end mechanical alignment adjustments
Verify that your new alignment readings meet your vehicle manufacturer's specifications (if applicable)
Importance of a Wheel Alignment:
Proper wheel alignment creates a smoother ride. So minimizing steering pull and vehicle wander. It also can save you money on replacing tires due to premature tread wear.
The vehicle manufacturers advise getting a four-wheel alignment at least once a year. Other times you definitely need a four-wheel or front-end alignment included.