Gold is the main currency in The Elder Scrolls Online. It will be used for a variety of items including everything from skill resets and profession good to mounts, vendor equipment and trading goods with other players. There are a variety of ways to obtain gold in the game.
The first way to obtain gold in TESO is to earn it while leveling and completing quests. Quests will reward gold. As you complete more quests and subsequently gain levels, you will naturally begin to stockpile gold. This process of gathering gold can be a little time consuming, but it is also the easiest way since moneymaking happens during the course of leveling. You will also pick up random items that can be sold to vendors for gold.
The second way to obtain gold in TESO is to sell items to other players. This is one of the secret to be rich in eso. The Elder Scrolls Online will be no exception. While it can be difficult to know what items players desire the most, by keeping a watch on the in-game economy, market boards and trade channels, you can learn what may sell well.
As a crafter or gatherer, your goods may be high in demand to other players. As a general rule of thumb, never sell any items that are labeled as crafting items or materials. These items may be of value to someone else even if they are not to you. Crafted items such as weapons, armor and potions can fetch an especially high price if someone really needs the item you are selling.
As players reach endgame in TESO, level cap crafted items such as weapons and armor will be worth a great deal of gold through crafting. This is also the case for consumable items such as potions and food items that grant extra attributes or combat effects. If you plan on leveling quickly, you can take advantage of the hole in the market and earn a great deal of gold by selling your wares in this manner.
Green or blue quality weapons and armor you find while leveling your eso class and questing may also be worth decent gold as players are still leveling and need any type of boost they can get. Prices will diminish on leveling items as more and more players reach endgame, but there will always be something of value for selling purposes.