Long-tail keywords are keywords or better said key phrases that consist of 3 or more words. They are more specific and will probably attract fewer visitors. However, they are more likely to attract those who have a high interest in the service, product, or topic overall. Therefore, you are more likely to get conversions rather than simple views.
Moreover, long-tail keywords are way less competitive than simple keywords, meaning that you have better chances to rank higher.
Users on the Internet use long-tail keywords in their searches, they also resemble natural language. You can find a long-tail keyword for your niche by:
- typing a simple keyword and letting the search engine (for example, Google Suggestions) autofill the rest for you
- using related searches
- using Google trends or other keyword tools
- taking a look at Google Analytics, specifically the sources of organic search
- reading your topic discussions on Quora, LinkedIn Answers, or other Q&A websites
- analyzing keywords of your competitors
