A lot of the recipes that I've seen on YouTube and different forums have used four main ingredients when making pizza dough - flour, water, yeast, and salt. I'm confused because I though sugar is also a main ingredient since yeast feeds on it. Would y'all recommend always adding sugar to the pizza dough recipe? Also, what if the flour that's being used already has a few grams of sugar - should I still add sugar to the list of ingredients?
There are plenty of fermentable sugars in the flours commonly used in pizza making. Additional sugar is completely unnecessary.
Sugar helps the dough rise faster, and increases browning. So using it is a matter of taste, and what you like in a pizza. If you're in for a day-long rise in the refrigerator (for example), you won't need any extra sugar. If you want it faster (say, an hour rise in a warm proofing box), a little extra sugar can help.
If you're happy with the way your pizza browns, leave it out. Extra sugar could even cause it to burn, especially if you're using very high heat. If you feel like your pizza could use an extra pinch of Maillardy goodness, add a little sugar (and be prepared for a shift in rising times).
The Enzyme Amylase helps break down flour starches into complex sugars that add to crust color, taste of the final produce and feed the yeast to produce Carbon Dioxide (bubbles). Slow rise gives the enzymes time to do their jobs. A quick discription