Just asking am i on right path?

Im trying To learn trading with these videos but there are times when i kinda fall of beacause i dont understand what is happening in the video. Example. Was watching the jedi entry video and fall Off when he started greating those long and short "stop loss things. My problem is that i dont yet fully understand what does stop loss mean and why you set the" take profit" in short, like are you selling when the price goes down or what. And final stupid question. Is bullish trade = buy and bearish trade = sell???