The in-form 20-year-old produced his fifth assist of the season to set up Bukayo Saka for the Gunners' second goal as they breezed past Newcastle 3-0 to extend their unbeaten run to six matches.
Asked what had helped him the most, Smith Rowe told Sky Sports: "I don't want to single out any player but Lacazette, playing together with him up top.
"It's helped me so much. On and off the pitch he gives me so much confidence. As we link up and play together he talks to me a lot, so I'd probably say him."
He added: "I've been abroad and I've been in the championship and I feel like it's developed me so much on and off the pitch.
"I feel like I've grown and matured into a stronger and more confident person. [Arteta] tells me so much to play free, clear my mind and just be confident.
"If I make a mistake, just carry on and forget about it. For me, to have a manager like that who's played for the club - he gives me so much confidence, so I'm really happy to be getting opportunities."