Protection and Fakes: What a Trademark Can Stop
Competition is always a companion of a business, and a trademark is one of your assets in this competition. You see how banks have different advertising slogans; if they hadn't registered them, anyone could have taken these slogans as their own. In a competitive market, the stronger your brand, the more chance of success you get, and you can compete more effectively if you register this brand.
If you register a brand today, and you realize tomorrow that someone else has already registered it in another city or province, there is no way to protect the name of your corporation or product except to turn it into a trademark. In that case it is globalized and you are confident that no one can ever use it for their brand.
I have many Trade Names for various businesses. Someone used one of my trademarks on Facebook. I asked him nicely not to do it and to remove the name, but he ignored my request. I notified Facebook about his page, which was a popular one, and it was taken down by Facebook in less than 24 hours. A trademark is no joke. If I had sued that person, as my compensation I could have received whatever he had earned using my trademark.
The manufacture of a counterfeit form of your products is one of the biggest problems you could solve using a trademark. When your trademark is registered, a fake product with your trademark can't pass through customs and ruin the market in a country like the US. You can even stop online sales of such products.