PetSmart is trying to maintain its dominance as a leading pet retailer.

The privately-held company, which has been around since 1986, reportedly brought in $2.5 billion in revenue in the second quarter of this year. But the retailer is also trying to stay relevant with its shoppers and find new ways to engage them. Stacia Andersen, PetSmart's chief customer officer, joined the Modern Retail Podcast this week and spoke about her role and the evolving pet space.

PetSmart is not a startup by any means. Its loyalty program boasts 55 million members, and it works with a variety of talent, like HGTV's Nate Berkus and Jeremiah Brent. But the landscape is getting more competitive. With that, Andersen said PetSmart has been evolving its marketing strategy.

"We evolved our brand voice most dramatically probably a couple of years ago, when we went back and looked at our customer base," she said. "Our brand voice evolved from individually marketing different sales or individually marketing services … to this overall brand platform and voice about why customers do what they do." The idea behind it was to connect with customers. "This is really what our brand voice is about," she said. "It's far more emotional, it's far less transactional."

With such a large business, figuring out the customer profile becomes difficult. But Andersen said the retailer has figured out a few things. For one, most of PetSmart's customers are female; they often have multiple pets; lastly, they're often from families with children. Understanding this overall profile, Andersen said, has helped PetSmart refine its overall marketing strategy, as well as its loyalty plan.

One of Andersen's most important mandates is establishing a retail presence that is more than just a place to buy pet food. With that, she's been leading various campaigns and partnerships to make the company more of a lifestyle brand. The idea isn't just to grow sales, but to do something deeper and give the brand more credibility.

"There is a buzz factor," she said, talking about PetSmart's influencer partnership strategy. "There is a wow factor. And it also lends credibility to our own design."