The phrase "extra oomph" means adding more energy, power, effort, or enthusiasm to something in order to make it better or more effective. Full definition
When I listened to MOON's «Hydrogen,» I really liked the crisp snares and controlled mids; the only thing I was missing was a little extra oomph for the pumping bass line. (laptopmag.com)
After accomplishing certain tasks, you can also fire off potent magical spells or summon creatures for extra oomph against the impressively large bosses. (gamecritics.com)
Adding a hit of berries, orange segments, or pomegranate seeds really add and extra oomph of flavor along with bright and colorful aesthetics (remember we eat with our eyes first!). (thebettyrocker.com)