It uses the internet. Most applications and data are in the "cloud". A Chromebook is an example of a thin client. This is a lightweight computer which uses remote access to a server. It depends heavily on another computer (its server) to do its computation.
In March 2018, Acer and Google announced the creation of the first Chromebook tablet: the Chromebook Tab 10. This device was to compete with the market for discount Apple iPad tablets in the education market. The tab 10 screen (9.7 inches, 2048 x 1536 resolution) was identical to that of the iPad. The device includes a stylus. Neither device included a keyboard.