Their vaginal tingles. SMV is a combination of looks, money, status, and persona. Persona is often equated with game. Your ability to manipulate her emotional state of being into an excited state will get her to keep coming back to you. Good looks always helps with that.
Money can help with game, but money doesn't have the effect that it once did. Simply put, if your SMV is more heavily weighted towards your money, you need more money now than you did 30 years ago to achieve the same things, outliers exempted. In today's dollars, a guy who is 27+ making $101,000 or $125,000 won't impress women. I know a guy in his late 30s making $130,000 or so and women still him like dirt. If you want to play the income game to attract women in dating, you need to make some sum of money that is well above what they can provide for themselves on their own. In most U.S. metros, I'm thinking the minimum is $200,000 but better effects will be had if income is much higher than that.
There are some lower paid men that attract women with their personas. This is why you see deadbeat guys in blue collar laborer jobs, some low end service sector jobs, etc. getting a lot of pusssy. They often have criminal records, which demonstrates characteristics women find attractive. It shows boldness and a lack of concern for rules. Additionally, these men often have tattoos, which are a part of looks, and demonstrate similar things, especially if large and visible.