It mattifies and make the pores less noticeable but not significantly. This is for those with minor flaws only. Being fragrance-free is a plus too.
Effect does not last that long. And even though it claims to be non-comedogenic, it will still break you out if you have silicone allergy.
FULL REVIEW: http://stylevanity.com/2018/03/maybelline-baby-skin-pore-eraser-review.html