I am a refugee staying in Danmark, and I have a convention passport travel document. Can I travel to Schengen countries, USA or Canada?
To travel to other Schengen countries, you don't need a convention travel document, just your residence permit card.
To travel to the US or Canada, you will need to apply for a US or Canadian visa using your convention travel document. If the visa is granted, this will be indicated by a sticker affixed to one of the pages of your convention travel document. With that, you will be able to travel to the country granting the visa.