The Morocco international scored two second-half goals as QPR beat local rivals Fulham 2-1 at Loftus Road to move off the foot of the table. It was the first win under Redknapp and QPR's first league victory since they beat Stoke City on May 6.
Taarabt was inspirational for most of the game and Redknapp enthused about his match-winning contribution.
"Fantastic ability, he was amazing today," said Redknapp. "He is an amazing talent, we have all seen it since I went to Tottenham, no one ever doubted his ability or his talent. I decided I had to get him in a position where he wants to play.
"He has been playing off the left but today I played him in the hole, off the front man and tried to get him between the lines – play little balls in those holes to him and every time he got the ball they were in trouble."
Rangers dominated for much of the game but conceded a late goal through a deflected Mladen Petric strike and Redknapp admitted the goal led to a tense final few moments at Loftus Road.
The result moves QPR onto 10 points and above Reading into 19th place and Redknapp felt it was a necessity to end the winless run before they were cut adrift. "At least it keeps us in there, if we hadn't won today it would have been absolutely desperate," he said.
"If you can take six points from every four games you will stay up – hopefully that can kick-start our season now and keep us going."