Why is "India tribal belt" trending?

Wikipedia Overview

India's tribal belt refers to contiguous areas of settlement of tribal people of India, that is, groups or tribes that remained genetically homogenous as opposed to other population groups that mixed widely within the Indian subcontinent. The tribal population in India, although a small minority, represents an enormous diversity of groups. They vary in language and linguistic traits, ecological settings in which they live, physical features, size of the population, the extent of acculturation, dominant modes of making a livelihood, level of development and social stratification. They are also spread over the length and breadth of the country though their geographical distribution is far from uniform. A majority of the Scheduled Tribe population is concentrated in the eastern, central and western belt covering the nine States of Odisha, Madhya Pradesh, Chhattisgarh, Jharkhand, Maharashtra, Gujarat, Rajasthan, Andhra Pradesh and West Bengal. About 12 percent inhabit the North-eastern region, about five percent in the Southern region and about three percent in the Northern States.