Individual product pages are natural homes for long-tail keywords, since a specific product, size, color, or use case is exactly the kind of narrow query long-tail search covers.
Target Product-Specific Modifiers
Size, material, compatibility, and use-case phrases attached to a specific product often have real, if modest, search volume worth capturing on the product page itself.
Use Long-Tail Terms in Titles and Descriptions Naturally
Working these specific phrases into product titles, descriptions, and specifications helps the page match the exact queries shoppers are typing.
Don't Neglect Comparison-Style Long-Tail Terms
Phrases like "product A vs product B" are long-tail, high-intent, and often under-targeted even by ecommerce sites with strong product SEO otherwise.
Next step: Use the Longtail Keywords Tool to find the specific product modifiers and comparison phrases worth targeting on individual product pages.