Despite the name, it's not principally concerned with civilian use of Pokémon, although it does sort of touch on them; instead, it mostly just talks about the Pokéride system as used by Pokémon Trainers in Alola.
Tauros are one of the most popular Pokérides available, and for good reason. Tauros are extremely fast and strong enough that wild Pokémon usually won't mess with them, which makes them ideal for getting around on land in a hurry, and they can smash through many obstacles in an emergency situation. they aren't the easiest Pokémon in the world to ride, but the ones available for rides go through special training, so unless you hurt them or they get badly spooked it's very rare for riders to fall off.
Stoutland aren't as fast of Pokérides as Tauros, but they are easier to ride on and have better senses, so they're very helpful for tracking down items - especially rare herbs or mushrooms. They also tend to be less noisy and intimidating, so they won't scare away wild Pokémon if you want to encounter them on the trip.
Mudsdale are perhaps the rarest land-based ride. They're extraordinarily easy to ride, but they're not that much faster than a human, so they tend to only get called upon when a trainer needs help carrying a heavy load or the terrain makes other rides impossible. Thanks to their earthen nature and high defense, Mudsdale can easily traverse even the sharpest and most dangerous grounds without injury.
Lapras are the primary water-based transportration Pokémon, and for good reason. While they're only native to the region during the summer, they can easily survive year round with food and several pods have lived in the archipelago full time for hundreds of years. They are very smooth swimmers, and can readily carry reasonably heavy objects across water for hours on end. Their high intelligence also makes it much easier for them to understand complex directions and means they almost never lose track of where they are on long journeys even if their rider gets completely lost.
Sharpedo aren't as easy to ride as Lapras, and have difficulties with extremely long trips, but in terms of fast travel they can't be beaten over water. Unencumbered, their ability to jet seawater out of their back allows them to propell themselves to speeds in excess of 75 miles per hour, and a single human's weight is not enough to seriously encumber that.
While they're rather rare as Flying-type Pokémon go thanks to their large diet, relatively late maturity, and small clutch sizes, Charizard is one of the most powerful fliers in the world, and the skybound transportation of choice for most of Alola. Most Flying-type Pokémon re stronger than they look, but even with the aid of the "Fly" HM, smaller birds such as Pelliper and Toucannon have issues with carrying a human being for very long. Charizards have no such issue, and are generally more both stronger and calmer than their main flight-based competion in Alola, Fearow. Their draconic ancestry allows them to easily keep riders warm even in cold air, such as those near Alola's mountain peaks.
People don't usually ride on Machamp, but they are still a standard part of the Pokéride system in Alola. Machamp are extremely strong, making them well poised for lifting objects. They, much like humans, are bipedal, so a path cleared by a machamp is almost always safe for Human transit, and they are well equipped to deal with falling rocks, cave-ins, or blocked paths.