The article below is just a basic introduction to the topic. For something more advanced, written by pros and a fantastic leveling guide, my recommendation would be this Elder Scrolls Online Leveling Guide. I could not find any other guide that comes even close in terms of the impact it had on me.
Another powerful faction within the Northwest and Western regions of Tamriel is the Daggerfall Covenant. The peoples within the regions were once enemies but due to the events in Cyrodiil, trade routes leading into the regions were effected. The domino effect afterward brought poverty and suffering to the peoples. Hence, under the leadership of the Merchant King of Wayrest, Emeric,will stand against the all who brought threat to his people and regions to bring back trade into the regions.
Emeric was a wise man who is undoubted skilled in battled and diplomacy. A wise leader that many look up to by strategizing and tactfully destroying enemies only to leave some alive, to tell the tale of this fierce king. He strategizes in invoking fear into his enemies to make a solid statement. With three strong factions by his side, the king has nothing to lose but only to vain victory and restore the trade routes back to where they belong.