In 2015, Blizzard started letting players buy gold from each other using WoW Tokens, to try to control the process and mitigate damage. “Time is money, friend — but sometimes one is harder to come by than the other,” Blizzard says on the official page. “Now World of Warcraft players can use the WoW Token in exchange for game time or Battle.net Balance!”
The leveling guides on my site are essentially speed leveling guides. My leveling guides are the same guides I use myself to speedrun to 60 on new servers to get 60 server first. I list many occasions where I tell the player to "die on purpose" to go faster. I tell the player to skip certain quests, because some quests are just not worth the time/XP. I list tricks and shortcuts to go faster so you can reach level 60 much quicker. I am still constantly going through them over and over again perfecting the guides to make them faster and easier to follow. For the most part, the guide can be followed without the need from other player's help, as the whole guide was made from a solo run anyways. Although I do list quests that can optionally be done if you have a group.
Sargeras - Alliance Sargeras - Horde Scarshield Legion - Alli... Scarshield Legion - Horde Sen'jin - Alliance Sen'jin - Horde Shadowsong - Alliance Shadowsong - Horde Shattered Halls - Alliance Shattered Halls - Horde Shattered Hand - Alliance Shattered Hand - Horde Shattrath - Alliance Shattrath - Horde Shen'dralar - Alliance Shen'dralar - Horde Silvermoon - Alliance Silvermoon - Horde Sinstralis - Alliance Sinstralis - Horde Skullcrusher - Alliance Skullcrusher - Horde Spinebreaker - Alliance Spinebreaker - Horde Sporeggar - Alliance Sporeggar - Horde Steamwheedle Cartel - Al... Steamwheedle Cartel - Horde Stormrage - Alliance Stormrage - Horde Stormreaver - Alliance Stormreaver - Horde Stormscale - Alliance Stormscale - Horde Sunstrider - Alliance Sunstrider - Horde Suramar - Alliance Suramar - Horde Sylvanas - Alliance Sylvanas - Horde Sanguino - Alliance Sanguino - Horde Saurfang - Alliance Saurfang - Horde Soulflayer - Alliance Soulflayer - Horde
Special note: At 110 it's almost certainly worthwhile to go and immediately get your Heart of Azeroth and first piece of Azerite gear from the BfA opening quest. It doesn't take long and provides pretty high power levels. I'd then return to Legion quests until 111 or even 112, since the power of these items will increase your kill speed significantly over the scaled enemies of BfA content.
Potions serve more utilitarian purposes, and it's up to you to decide whether to make use of them. The most common is the Swiftness Potion, which can provide you a handy boost in speed while going after annoying quest objectives indoors. These are generally MASSIVELY overpriced, because people know how useful they are. I opted not to spend the gold since Warriors are already fairly mobile, but slower classes may benefit greatly from these.
In my opinion, Zygor makes the best WoW leveling guides. They have been around for more than 10 years, which shows their commitment to maintaining and updating their guides to provide you with an optimized leveling path for any class and race, whether it’s Horde or Alliance. Zygor is an addon that includes a waypoint arrow and a separate window with instructions that, taken together, show you step-by-step how to level your character to 120, FAST. You’ll know exactly what to do at all times. It’s also very easy to jump in at any level; you don’t have to start exactly at level 1 or 110 or anything. It’s a bit more expensive than the other options, but I’d say it’s definitely worth it.