Final answer:
A long-tailed keyword phrase is an extended, specific search query like 'women's trail running shoes for overpronation,' which targets users who are closer to making a purchase.
Step-by-step explanation:
The best example of a long-tailed keyword phrase would be a phrase that is more extended and specific than general keyword terms. Long-tailed keywords typically have lower search volumes but high conversion rates as they capture people later in the buying cycle. For instance, instead of a broad keyword like "running shoes," a long-tailed keyword example could be "women's trail running shoes for overpronation." Such a keyword is specific and likely to bring in traffic that is more targeted and closer to making a purchase.