I want to install Certificate, I have looked on the wiki but finds it very unclear to me who can help me?

you need to upload the certificate to your routeros system.

You can do this with winbox by drag and dropping the file in the winbox screen.

After you have done that go to system -> certificates and select the one you want to import.
Then press the import button.

Thanks for your repley
Where can i make a certificate

Here is manual how to create self-signed certificates:
http://wiki.mikrotik.com/wiki/Manual:Cr ... rtificates

HTH,