The most frequent reason
Don't worry, you can't avoid all impacts, but there are certain habits that will help you avoid some. As you can probably imagine, the most frequent reason for a windscreen breakage is the stone thrown by the vehicle in front.
We therefore recommend that you keep your distance from other cars, especially trucks and agricultural vehicles.
In order to prevent thermal shock, we recommend that you use a blanket on your vehicle on cold nights and during hot weather, and that you do not turn on the air-conditioning at full blast or too cold.