In Spider Climb 5E, until d&d spell ends, one of the willing creatures which you do touch would gain some ability to move up, and even across the vertical surfaces and upside down along ceilings, during leaving its hands free. The target even gain a climbing speed too which is equal to its walking speed.
Did you read shocking grasp 5e spell article?
DnD 5E Spider Climb Attributes
|Casting Time||1 action|
|Classes||Sorcerer, Warlock, Wizard|
|Components||V S M|
|Duration||Up to 1 hour|
|Material||A drop of bitumen and a spider|
|Target||One willing creature you touch|