SEO for Product Descriptions

I see a product description as a salesperson who also whispers to Google. You want it to convince a shopper to click 'Add to Cart' while telling the search engine exactly what the product is and who it's for. The trick is doing both without sounding robotic. Write like you're explaining the product to a friend who is slightly in a hurry.

Take a concrete example. I rewrote a description for a £45 kettle. The original was manufacturer copy: 'Stainless steel, 1.7L capacity, auto shut-off.' My rewrite added benefit language: 'Boils water in under 3 minutes for your morning pour-over. The 1.7L capacity fills four mugs, and the auto shut-off means you can walk away without worrying.' I also added a FAQ snippet answering 'Does this work with induction hobs?' (yes, it does). Conversions on that page rose 22% in two weeks. The keyword 'fast boiling kettle' moved from position 11 to position 4.

Some say keep product descriptions short because shoppers scan. I say that only works when the product is self-explanatory. A pack of plain white socks needs 50 words. A GPS watch with altimeter and heart-rate zones needs 500. Let intent and complexity guide length. Use headings, bullets, and spacing to help scanning, but never strip out the details that answer real purchase questions.

Product description SEO matters most for high-intent searches. Someone searching 'organic cotton baby onesie size 6-12 months' is ready to buy. If your description lacks the words 'organic cotton' or '6-12 months', you vanish from that query. I ran a test on that exact phrase. My original description was generic — 'cute baby bodysuit'. I rewrote it as 'Organic cotton baby onesie, size 6-12 months, snap closure for easy changes.' The page went from page 3 to the top of page 1 for that exact term within a month.

It also matters in competitive niches. If 50 stores sell the same Bluetooth speaker, unique descriptions are one of the few levers you control. Manufacturer copy is identical across dozens of sites. Google sees that and treats those pages as thin or duplicate. Unique copy gives you a shot at ranking.

Edge case: commodity products with no unique selling points, like a plain white T-shirt. You still need a unique description, but you can focus on size guide, fit, return policy, and fabric weight. Structure it for scanning with [internal links](/on-page-seo/) to related guides. For complex products, add a specs table and [alt text](/alt-text/) to images. The description alone won't win the page — [meta descriptions](/meta-description/) and [title tags](/title-tag/) also need attention.

I used to copy manufacturer descriptions. It felt efficient, especially when listing dozens of products. But Google treated those pages as thin or duplicate content. Rankings suffered. I had a series of kitchen scales that all shared the same manufacturer blurb. None ranked beyond page 5. After rewriting each with unique copy, three of them hit page 1 within three months.

I also stuffed keywords. I remember a pair of blue running shoes where I used the phrase 'blue running shoes' eleven times in a 200-word description. The copy was unreadable — 'These blue running shoes are lightweight blue running shoes for men. If you want blue running shoes...' Embarrassing. Bounce rate was 85%. Conversions: zero. I learned that one mention in the title, one in the opening sentence, and one in the alt text for the hero image is enough.

I used to write for search engines first. I thought if I included every possible synonym of 'waterproof jacket', Google would love me. It didn't. Shoppers want to know if the jacket breathes, if the hood fits over a helmet, and whether it packs into its own pocket. Now I always start with buyer questions. I also changed my mind about length. I used to believe every description needed 300 words minimum. Now I write 50 words for a pack of socks and 400 for a camping stove. Matching length to intent is more honest and performs better.