An estimated 37% of the world's population, or 2.9 billion people, have still never used the Internet.

Of the 2.9 billion still offline, an estimated 96% live in developing countries. And, even among the 4.9 billion counted as Internet users, many hundreds of millions may only get the chance to go online infrequently, via shared devices, or using connectivity speeds that markedly limit the usefulness of their connection.

Source: https://www.itu.int/en/mediacentre/Pages/PR-2021-11-29-FactsFigures.aspx