Snow foam and pre-wash are typically used before washing a vehicle as a means of loosening and removing dirt, grime, and other contaminants from the surface. Some benefits of using snow foam and pre-wash include:

Ease of use: Snow foam and pre-wash are designed to be easy to apply and use, making the process of washing a vehicle less strenuous and time-consuming.
Improved cleaning: Snow foam and pre-wash help to loosen and remove dirt and grime from the surface of a vehicle, making it easier to wash and helping to prevent swirl marks and scratches from developing.
Enhanced protection: Some snow foam and pre-wash products contain ingredients that help to protect the paint surface from damage during the washing process.
Cost savings: By helping to remove dirt and grime from the surface more effectively, snow foam and pre-wash can help to reduce the need for more aggressive and abrasive cleaning methods, potentially saving time and money in the long run.

Overall, using snow foam and pre-wash can help to improve the overall cleaning and protection of a vehicle, making it a worthwhile investment for those who want to keep their vehicle looking its best.