Because campaigning works differently across the globe. So does media coverage and politics and how the different parts of legislative share competence/responsibility.

I’d say you need to follow local news and what happened in the last years to make an informed decision. See which party/politicians built children’s playgrounds, did something useful for the community and which major tore down the shops in the city center to make space for more lucrative office buildings… It’s really difficult to tell if you don’t knkw what’s happening around you but just following world politics. And where I live they have some scarce information online. And you can also go to them if they do some campaigning and listen to them or read some advertising material.