What is the difference between regular Minecraft and Minecraft Realms?

Hello,

What is the difference between regular Minecraft and Minecraft Realms?

Thank you

Minecraft is the base game and Minecraft Realms some additional monthly subscription service of shared servers. You don't need Realms to play Minecraft but it might be helpful if you plan on playing online with friends and want some persistent worlds that everyone can join. However, you don't need realms to play online.

-Byshop

So regular Minecraft will play online?.... just without shared servers?

Without Minecraft Realm's shared servers specifically, but there are plenty of other Minecraft servers out there that you can play for free.

-Byshop