Quick take
Perplexity is useful when you need a fast research starting point with sources you can open. It is better for finding, comparing, and narrowing information than for writing a final answer. The mistake people make is treating the answer box as the source. Open the links, check the dates, and use the answer as a map.
Best fit
Use Perplexity for topic research, source discovery, competitor checks, academic starting points, market notes, and learning paths. It works best when your next step is to open sources and decide what is worth reading.