A broad search term can describe a very large subject without telling you much about the person using it. A more specific query can give you a clearer question to answer.
The gold is in the specific question you can answer, not a five-word formula or a magic percentage of traffic.
What does long-tail actually mean?
The long tail refers to the many queries that each receive relatively little demand compared with the most popular searches. Their combined importance can be substantial, but their share is not automatically eighty per cent of every website's traffic. Research on long-tail search describes needs that are individually unpopular, not a fixed formula based on word count.[1]
Specific phrases often occur in that tail. Length alone does not prove that a query has low volume, low competition or strong buying intent.
You need evidence about the question and the audience, not just a longer keyword.
Use the question to understand the job
Compare “tablet” with “best tablet for graphic designers”, or a phone name with a question about the service plan.
The more detailed query gives you a possible context for useful content. Someone comparing a tablet for design may need to understand workflow, compatibility or other requirements. That does not prove they are about to buy from you. They might be researching for someone else or gathering information for later.
Likewise, a short query can come from a person who knows exactly what they need. Read the wording as a clue, not a complete psychological profile.
Answer something your business is qualified to explain
Start with the questions customers actually ask and the topics your work gives you a reason to understand. Which could you answer properly, and which belong with another specialist?
For a design business, a useful question might concern preparing website content or deciding whether the identity needs to change before a redesign. You do not need to chase unrelated product searches simply because somebody estimated a useful volume.
Give the question a complete answer. Do not publish a separate thin page for every slightly different phrasing. Google's language systems can relate a page to relevant queries without requiring every variation to appear verbatim.[2]
Check the opportunity
Look at the search results, the existing page and whatever reliable demand or performance information you have. Does the content available answer the need? Could you contribute something more useful? Is that subject relevant to the business you want to attract?
Tools estimate demand. Put that estimate alongside the question, the audience and the work you could contribute. A low-volume query might be valuable, or almost nobody relevant may ask it.
Judge the enquiries or other outcomes you can actually observe. Do not assume a higher conversion rate merely because a phrase has become longer.
The point is to become useful around specific needs, not to collect obscure search terms. The right question gives you a better content brief. You still have to write the answer.