Here's a page which will give you some of the most helpful tips and tricks on the multiplayer mode of Call of Duty: Black Ops 3 to make you a pro and dominate all your opponents in all multiplayer matches.
For starters, Ace shows the best way to set up your classes in Call of Duty: Black Ops 3 from level 1. As well as explaining how to stay alive longer. :)
Multiplayer Part 2: Ranking Up Here’s how to rank up in multiplayer with some tips to speed up the process and get the upper hand over your buddies & enemies in the field. Prestige explains why playing the OBJ, choosing the right game mode, and having a comfortable class will let you glide right through the levels.
Multiplayer Part 3: Top 5 Guns for Low Levels Call of Duty: Black Ops 3 has slower leveling than most Call of Duty games and instead of unlocking a new gun per level, you have unlock Tokens. You must use your Tokens wisely. So Driftor made a guide of the Top 5 Best weapons for low levels. These are great guns that you can pick up before level 20 to help you carry on through your first prestige!
Multiplayer Part 4: Weapon Scopes & Sights Attachments Next up Tmar goes over all 6 new Weapon Scopes and Sight Attachments available for optics in Call of Duty: Black Ops 3.
Multiplayer Part 5: Jumps & Wall Run Spots A quick tutorial for you to find out where in the Aquarium map you can find jumps and wall run spots.
Multiplayer Part 6: Jump Farther Tip This quick tip will allow you to jump even farther than you’d normally be able to with the thrust jump in Black Ops 3, if you tap the thrust button while you jump.
Multiplayer Part 7: Faster Reload & Pickup Tips This (for now) last video guide gives some more gameplay tips and allows you to reload your gun faster as well as pick up guns faster in Black Ops 3. This involves using the “YY” technique since the sprint cancel technique no longer works.