I am kind of confused here. So when i get engaged to a girl, i give her engagement ring and then on the wedding day i have to give her a wedding band.
But, do they wear Engagement Ring and wedding band together all the time ? or how does it work ?

Or can i just give Wedding band and not the Engagement ring ? 

I am planning to get married (probably enagement on the same day ? ) so what's the best thing to do here ?

Please suggest.

Thanks.