Hiking means to walk over long distance to explore untouched nature.
Hiking is commonly used when describing long walks, day hikes. Trekking is normally used when describing long hikes, multi day hikes equals trekking. Yet, in Canada and in US hiking is the preferred word for long distance walking. Still, trekking is the preferred word when it comes to multi day hikes.
Hiking can be a way to get away from the busy city life and daily stress. “Hike more, worry less” is a saying and it makes perfect sense. To hike is to explore. To hike is to journey. Use ones own feet to roam around, getting away from something, getting closer to something.
To hike can be 100 % free of charge. It demands your time and energy. And there is no correct place to hike. If it is in a village, around a lake, into a forrest or a day hike up a small mountain. It depends on where you are and what you can do.
Whatever type of hiking you do, remember to enjoy every step, even the steep ones!