The Internet is a pool of information. One can find immense amount of content on a single topic or search. But many readers look for content that is kept simple and easy to understand.
Good headlines are driven by good verbs. As they say in The Elements of Style: “Write with nouns and verbs, not with adjectives and adverbs.” But, use powerful verbs vs. passive verbs. Think "How to paint"(powerful verb) vs. "Painting a room" (passive verb).
You might think adding an air of mystery will make the reader want more. Actually the more specific the better. Your headline should tell the reader exactly what they're going to get out of your content. Target your story, know who you're writing to, and give them something useful.
The average reader absorbs only the first three words and the last three words. With just six words you increase the chances of pulling the reader in and making them want to read more.