Pre-trade training is a good way to get a taste of working in a particular industry. You develop knowledge and practical skills in a particular area of work.
In some programs you get on the job training, allowing potential employers observe you in the work environment. You may also be paid for the training!
The best approach for finding information on this site is to research your trade from the main menu, which will describe the trade, reference training institutions and programs, and display current job listings for the particular trade.