Fungi are important natural edible and medical resources.
Mushrooms make up a huge part of the ecosystem, and are responsible for recycling material in the ecosystem by decomposing organic matter into inorganic matter.
Even the most common mushroom in a forest or on a roadside plays the role of cleaner, returning material to soil by decomposing waste into the soil.
If there was no cleaner like this, the Earth would be a huge garbage dump of dead bodies and organic matter.
About 14,000 species of mushrooms, the representative type of fungi, live on the Earth, and they have a close relationship to us as edible and medicinal resources.