The toner is marketed as an “Age-Defying Toner with Retinol, Collagen & Peptides” (400 ml size) under the Estelin brand.

According to listings, key ingredients include retinyl palmitate (a form of vitamin A / retinol derivative), niacinamide, collagen, peptides, sodium hyaluronate, centella asiatica leaf extract.

Claimed benefits: reduces fine lines, smooths complexion, improves skin texture, hydrates, gives a “radiant and youthful glow”.
Retinyl palmitate is a gentler derivative of retinol/vitamin A, so it may work more slowly than stronger retinol forms, but often is less irritating.
BnG Store

Presence of peptides + collagen suggests a “firming/support” angle in addition to renewal.

Humectants like glycerin, sodium hyaluronate listed — good for hydration.
BnG Store

Being a toner, purpose is likely to be used after cleansing, before serums/moisturizer, to “prepare” skin and provide some active benefit.

One caveat: as a toner with retinol derivative, its concentration and packaging will impact how effective it is. Some retinol-toner formulas may not penetrate as well as dedicated retinol serums.