Your climatic conditions
We have summer, winter and all-season tyres whose performance is designed according to climatic conditions.
When the temperature drops below 7°C, winter tyres are better than summer tyres.
When the temperature becomes milder again, your winter tyres can then be replaced with summer tyres.
This also applies if you live in a place with moderate temperatures and that you frequently travel by car where winter temperatures are more severe, eg in the mountains for skiing.
All-season tyres are otherwise a polyvalent solution.