Based on the search results, “Silk & Shine” products are primarily known as Hair & Care Silk-n-Shine, which is a popular leave-in serum/conditioner designed to instantly smoothen, detangle, and add shine to hair.
While the search results primarily feature 45ml, 50ml, and 100ml bottles rather than a 90ml variant, here is what the product generally entails:

Key Characteristics & Benefits
Purpose: It acts as a leave-in conditioner or serum to treat dry, rough, and tangled hair.
Key Ingredients: Enriched with Fruit Vitamins, Vitamin E Acetate, and conditioning agents like Dimethiconol and Silicones.
Result: It coats each strand to detangle knots, reduce frizz, and provide a “parlour-like” silky, soft, and glossy finish.
Usage: It is generally used on damp or dry hair, primarily from mid-length to ends, and is often used to tame frizz before styling.
Protection: Helps protect hair from environmental damage caused by dust, sun, and pollution.

Alternative Product Identification
Some search results also point to Warisha BTC Silk & Shine Hair Spa or other “Silk & Shine” branded conditioners containing ingredients like Shea Butter and Aloe Vera for deep hydration.
How to Use
Apply 2-3 drops on palms.
Spread it evenly.
Apply on damp or dry hair, from mid-length to ends.