The 22-year-old struck midway through the second half against 10-man Udinese when he drove a pass from Suso under the body of goalkeeper Daniele Padelli.
With rivals Young Boys beating Anzhi that strike was the difference between Liverpool going through to the last 32 and getting knocked out.
And after a difficult few months on the fringes of the team Henderson believes only his third goal in 65 appearances since his £16million move from Sunderland is just the tonic he needed.
"It is always nice to get goals and it was a good moment for me to score," he said.
"I have missed a few good chances in games so it was nice to put one away and hopefully I can keep scoring from now on.
"I have always tried to improve my goalscoring. Even when I've been getting good chances of late I've not put them away so I started to think I need to score and I've managed to do that so I'm happy.
"I think if you score goals then it does give you more confidence.
"You have to keep working hard, keep doing the things you have been doing and it will pay off in the end. It is always nice, no matter what type of goal or when it is, to score goals personally and for the team.
"I think everyone is delighted with the performance and the result and for me, personally, I am delighted with the goal."
- Sports & Recreation