Miller struck in the Baggies' 2-2 draw with Blackburn and he told his club's website: "My mum was there with all my family.
"And when things weren't going well this season and I was getting chances but they weren't going for me all my family were there behind me.
"I was just trying to repay them for that. As a striker if you get chances goals will come. It's the law of averages.
"You know if you keep getting chances in a game goals will come and I always kept belief in my own abilities. Hopefully I've got a few more goals coming.
"I just try to score as many goals as possible and help the team out as much as I possibly can. I could have had another one against Blackburn but it hit the post.
"It was going towards the net and then it skipped onto the post."