The lines running from the nose to the corners of the mouth. Often improved indirectly by supporting the cheek first, rather than filling the fold itself.
These are the folds that run from the nose to the corners of the mouth, and they deepen with both age and midface volume loss. Filling the fold directly can look obviously “filled” if overdone, so the more common approach is to support the cheek first and let the fold soften indirectly — then add a conservative amount directly only if needed.
This is general education, not a treatment plan. What you actually need depends on your anatomy, muscle strength, and goals — Rocio determines that with you in person.