The former Valencia man wrapped up a 3-1 Primera Division victory over Celta having enjoyed strikes against Deportivo and Celtic in recent weeks.
He told Marca: "I'm getting used to scoring goals but it's not my speciality as I'm a left winger, but it's always good when it happens.
"I like joining the attack and I'm lucky to have team-mates who give good service.
"It's a very important win and I'm happy with the goal.
"Celta are a really quick team on the counter, and can be very dangerous, and I think if we'd read the game better then we would have played better."
It was a rare night off goalscoring duties for Argentinian striker Lionel Messi, who witnessed the birth of his first child this week.
"Congratulations to Messi. It's a great feeling becoming a parent," Alba added.
Celta boss Paco Herrera was encouraged by his side's display, despite the Celestes missing the chance to climb into the top half of the league table.
"The same dynamic lasted throughout the match, with Barca attacking and us trying to close down the spaces," Herrera said.
"We wanted to try and keep the ball as long as possible and then break forward.
"We just tried to do the right things, nothing more.
"The best conclusion that we can draw from this game is that we are getting stressed from playing so many away games.
"Tito (Barcelona coach Vilanova) told me after the game that we had really made them run, so that's something to take away."