what does local mean in lua code example

Example 1: lua local

local name = "jojo"
print("Hello, "..name)

Example 2: lua variables

local NumberVariable = 1
local StringVariable = "TextHere"
local BooleanVariable = true --// can also do false

Example 3: lua variables

-- Nil (no value)
-- Number => Example: 1234567890
-- String => Example: "random text"
-- Function
-- Userdata
-- Boolean (true/fanse)
-- Table
-- Thread