Evaluate

Evaluate[expr] causes expr to be evaluated even if it appears inside a function that holds its arguments.

Examples

Evaluate inside Plot:

Plot[Evaluate[Table[x^n, {n, 1, 3}]], {x, 0, 1}]

Force evaluation in Hold:

Hold[Evaluate[1 + 1]]
(* Hold[2] *)

Please visit the official Wolfram Language Reference for more details.