what is less command? in linux code example

Example 1: less in linux

Command						Action
Down arrow, Enter, e, or j	Move forward one line.
Up arrow,y or k				Move backward one line.
Space bar or f				Move Forward one page.
b							Move Backward one page.
/pattern					Search forward for matching patterns.
?pattern					Search backward for matching patterns.
n							Repeat previous search.
N							Repeat previous search in reverse direction.
g							Go to the first line in the file.
Ng							Go to the N-th line in the file.
G							Go to the last line in the file.
p							Go to the beginning of fthe ile.
Np							Go to N percent into file.
h							Display help.
q							Exit less

Example 2: less in linux

less [OPTIONS] filename