You can visit friends, relatives or even apply to come spend your vacation in Canada. Every visit is individual and conditions will be different.
Some visit visa applications will require an invitation letter from the person inviting you to Canada. Some invitation letters will also need to be notarized by a Notary Public or a Commissioner of Oaths. I will take you through these procedures to ensure that nothing is omitted in your application.
You can attend a conference, symposium or any legal gathering in Canada so long as you have applied and have been allowed in as a participant, an observer or a guest. If you are a journalist, you may be allowed in as a reporter or part of the information crew.
You can be allowed into Canada as a tourist. Canada is open to tourists from any part of the world, and as long as you can prove your intentions to the visa officer, there will be no problem getting a visa issued to you.
An invitation letter from a friend or a confirmed participation at a conference will not be the basis upon which a visa to Canada will be granted to you. The visa officer will ask questions regarding your return to your home country. This is one area where professional advise is needed. Please email me on vnkaranja@gmail.com