Step 1 : Know how to access the Ender Dragon. The Ender Dragon lives in a domain referred to as "The End", which is the final area in Minecraft's background story. In order to reach The End, you'll have to either find or build an End Portal.
Step 2 : Create your End Portal in Creative Mode. Since you can't actually build a portal to The End in Survival Mode, you should consider using Creative Mode to give yourself the necessary resources—12 End Portal blocks and 12 Eyes of Ender—and then create the End Portal itself.
Step 3 : Find an End Portal if you're playing on Survival Mode. If you don't use Creative Mode to build your End Portal, you'll have to find an existing End Portal in a stronghold.