A custom domain allows you to have a professional looking domain such as example.net or play.example.net.

Go to your NameCheap dashboard.
Select your domain and click Manage.

Click Advanced DNS.

With a dedicated IP:
If you have a dedicated IP, you are not required to make a SRV record, as you have Minecraft Java's default port.

Press Add New Record, then select A Record.

In the Host box, type @ if you want it to be just your domain, or you can put play/mc if you wish for that to be the domain prefix (play.revivenode.com/mc.revivenode.com).
In the IP Address box, type your Minecraft server's IP (without the port).

Finally press the green tick.

If you put a @ in the A record, you should use the first one, if you used play/mc/anything else, you need to use the second one.

This can take up to 2 hours to update and start working!