The product is specifically described as useful for hair that is highlighted, bleached or regularly heat-styled, so it is a reasonable choice for those hair types. Because it is a spray rather than a heavy serum, it is meant to give a polished finish without leaving the hair looking greasy. That makes it more suitable for fine hair than many thick oils or creams, but fine hair still needs a cautious approach.
Leave-in products can build up quickly on fine strands, making hair look flat or lank. Start with one light spray on the mid-lengths and ends, then assess the result. If the hair feels coated or looks dull, use less next time. On a sensitive scalp, avoid spraying directly onto the roots; spray into your hand first and then smooth it through the lengths if necessary.
Freshly lightened or extremely dry hair can be more porous and may absorb the product unevenly. The product description notes that such hair should be tested with a small amount first. If you have very damaged or over-processed hair, this spray can help with smoothness and shine, but it is not a deep conditioning treatment. Keep using your regular conditioner or mask as needed, and treat this spray as a finishing step for styling and daily shine.