1) role/title alignment with career goals - this also covers tech stack being interesting
2) benefits - specifically 401k, in the US all employers offer healthcare so unless yours is exceptional I don't think it's worth promoting
3) salary; it doesn't need to be FANG level but if it doesn't beat my current role there's no point in starging a conversation
Those looking for a role comprise a small proportion of the total population you could target. And this subset is likely to have lower average quality than the relevant population, because those who are 'good' will spend less time before finding a good match.