• register with some apps
• access the free wifi in some cafes
• sign up for bloody anything at all online

Seriously: it’s basically a public-facing ID. You use it joining practically any site. They check a national database where your name and ID number have to match. But it’s also your one and only serious national ID for many things. And if people get it, identity theft can really mess up your life, albeit (normally) temporarily.

Which is to say, it’s a terrible policy. Terrible *government* policy, it’s worth noting.