The Braille pattern dots-0 ( ⠀ ), also called a blank Braille pattern, is a 6-dot or 8-dot braille cell with no dots raised. It is represented by the Unicode code point U+2800, and in Braille ASCII with a space.
Braille pattern dots-0 Wikipedia
In all braille systems, the braille pattern dots-0 is used to represent a space or the lack of content.
Related to Braille pattern dots-0 are Braille patterns 7, 8, and 78, which are used in 8-dot braille systems, such as Gardner-Salinas and Luxembourgish Braille.