How to make screen display?

Hello how do I make an ad on the screen in minecraft java version 1.14? So where to enter dead, points, and so on? Is this scoreboard? How does it work?

Could you please send in a command.

1.

The adjective is dead, the dead are dead. Do you mean maybe death?

2. Yes, the command is scoreboard. However, you will need much more than a command for this. Inform yourself on e.g. The Minecraft Wiki on how the command works.