You'll write your product description once and reuse it dozens of times - on your landing page, in directory submissions, in launch posts. Getting it right is high-leverage, and most founders get it wrong the same way: describing the product from the inside ("AI-powered platform leveraging...") instead of from the user's problem.
The tagline: one sentence, one job
The tagline's only job is to make the right person think "that's for me." A reliable formula:
[What it does] for [who it's for] - "Uptime monitoring for solo developers." "Invoicing for freelance designers."
Rules that hold up in practice:
- Under 10 words. Directories truncate long taglines; so does attention.
- Specific beats impressive. "Test APIs without writing scripts" beats "Revolutionize your API workflow."
- No category jargon. If the tagline needs the reader to know what "reverse ETL" means, it only works on people who already know the category.
The description: a four-part structure
For the 100–300 word description that directories and your own site need:
- The problem, in the user's words (1–2 sentences). "Checking whether your API is up shouldn't require a paid plan and a 30-minute setup."
- What the product does about it (2–3 sentences). Concrete actions, not adjectives: what does the user do with it, and what happens.
- Who it's for and what makes it different (1–2 sentences). One real differentiator stated plainly beats five vague ones.
- Proof or specifics (1 sentence). Numbers where you have them: free tier limits, setup time, customer count if it's real.
This structure works because it mirrors how people evaluate: is this my problem → what does it actually do → is it for someone like me → can I believe it.
Mistakes that get listings rejected or ignored
Directory reviewers and users skip the same things:
- Keyword stuffing - "best free API testing tool monitoring platform software" reads as spam to reviewers and to Google
- Marketing superlatives with no content - "revolutionary," "seamless," "next-generation" carry zero information
- Describing the company instead of the product - nobody browsing a directory cares when you were founded
- A wall of features - features list what exists; a good description says what the user gets
Adapting one description everywhere
Write the full version once, then derive: the tagline is part 2 compressed; a tweet-length version is parts 1–2; your directory submission is the full thing unchanged. Resist rewriting per platform - consistency is also how people recognize the product across channels. The submission workflow is covered in how to get listed on directories.
Bottom line
Formula: problem in the user's words → what the product does → who it's for → one piece of proof. Under 10 words for the tagline, 100–300 for the description, zero superlatives. Then reuse it everywhere - starting with a free Pinstack listing →