Based on the search results, there are a few variations of products named “Silk & Shine,” with the most relevant to a “120 ml” or similar size being a nourishing hair serum designed for smoothing and shining, while “Silk & Shine Conditioner” often appears as a thicker hair spa/mask in larger, 500ml+ sizes, such as from the brand BTC.
However, based on the description of a “Silk & Shine Complex” aiming for hydration and shine, here is what this type of product typically offers:

What is Silk & Shine Complex Product?
Purpose: It is a professional-grade hair conditioning or smoothing formula (often a serum or hair spa/mask) designed to provide intense moisture, control frizz, and add shine to dull or damaged hair.
Key Benefits:Intense Hydration & Smoothness: Formulated to nourish dry, frizzy, or chemically treated hair.
Shine Enhancement: Contains ingredients that improve hair texture for a glossy finish.
Detangling & Management: Makes hair easier to comb and style.
Damage Repair: Often used as a hair spa to repair environmental or heat damage.
Common Variations Found
BTC Silk & Shine Hair Spa (500ml or 1000ml): A salon-grade creamy hair mask for dry, damaged, or colored hair.
Silk-N-Shine Hair Serum (50ml): A leave-in serum often used for instant frizz control and shine.
Ojas Silk & Shine Conditioner: A hair care product focused on silk proteins and shine enhancement. [1, 3, 4, 5]

Usage Directions (General)
Shampoo: Wash hair with a mild shampoo.
Apply: Apply the Silk & Shine product to damp hair, focusing on the mid-lengths and ends (avoiding the scalp if it’s a heavy conditioner).
Leave/Rinse: If it is a mask, leave it on for 2-3 minutes (or longer if it’s a spa treatment) and rinse thoroughly.