Buddhists follow the teachings of Siddhartha Gautama, given the title of the Buddha—the “enlightened” or “awakened” one. He was born the son of a nobleman in northern India in the 6th century BCE. He grew up in a palace protected from the harsh realities of life, but when he eventually encountered suffering, old age, and death, he left the palace to search for understanding of suffering and the way to end it. When he reached enlightenment, he began to teach the Four Noble Truths:

Suffering exists; There is a reason for suffering; There is a way to end suffering; The way to end suffering is through the Eightfold Path.

The Eightfold Path consists of Right Views, Right Thoughts, Right Speech, Right Action, Right Livelihood, Right Effort, Right Mindfulness, and Right Concentration. By learning and practicing this path one can eventually escape the cycle of birth and death. Buddhists believe that all beings are reborn into many different forms because of the ties of desire. When desire is allowed to cool like a fire going out, the attachment to the cycle of birth and death is loosened. Buddhists try to perfect the qualities of wisdom, compassion, and harmlessness in order to achieve enlightenment, or Buddhahood, leading to the highest peace and freedom, which is nirvana. According to Buddhist tradition, there have been other Buddhas both before and since Siddhartha Gautama.

The teachings of the Buddha were handed down orally and eventually written in the first century BCE in a collection of writings called the Tipitaka—“three baskets.” Different versions survive in Chinese, Tibetan, and Pali (an ancient south Indian language), and they are now translated into hundreds of languages worldwide. There are also important Buddhist scriptures written by later sages and scholars, many of them in the ancient Indian language Sanskrit.

There are three main branches of Buddhism: Theravada, found mainly in southeast Asia, Sri Lanka, and India; Tibetan Mahayana; and Chinese/Japanese Mahayana. There are also a wide variety of new Buddhist movements.

Each branch of Buddhism has its own festivals. The most common is Wesak (May/June), which celebrates the birth, enlightenment, and death of the Buddha, all of which happened on the same day in different years.

It is impossible to estimate the numbers of Buddhists worldwide, as there is no central organization. The majority of Buddhists live in Asia, although Buddhism is growing rapidly beyond Asia, particularly in the United States and UK. More than 85 percent of the population of Myanmar (Burma) and Thailand are Buddhists, and more than 70 percent in Cambodia, Laos, and Japan. Buddhism is the state religion in Thailand and Bhutan. There is no central authority in Buddhism, each school having its own teachers and spiritual guides, although figures such as the Dalai Lama have raised the worldwide profile of Buddhism and voiced a Buddhist viewpoint on world affairs.
http://www.ajmalbeig.addr.com/islam/religions.htm#Buddhism

https://www.islamstory.com/index.php/en/artical/25395/world-religions-buddhism