A scene is where the action is.
Growing up in the 50's and 60's we all wanted to be where the action was. How many cool scenes had nothing of significance only that it was a groovy place to be?
Scenes in a novel need to have pertinence to the story and plot. If your protagonist is having a great time and lots of action but not one bit of new information or she's grooving at a stand still, get it out of your manuscript.
A scene has a beginning middle and end. It incorporates character, POV, action, dialogue, plot, and conflict.
It's important to ground your reader at the beginning where the hero is and what POV (if there's more than one) the reader is viewing through.
In the middle, conflict and drama take place. This is where it should get hairy. A complication that causes a struggle for your hero.
The end will give your reader a reason to keep reading. Whether it's bits of information about the plot or a cliff hanger leaving her not able to turn the page fast enough.
To read more, I love Make a Scene by Jordan E. Rosenfeld.