Mirror's marketing headline "You're not who you think you are." is thought provoking and makes you pause. Here's why this broad H1 works well:

• Stops the scroll and creates immediate intrigue that compels further exploration.

• Challenges the reader's perception of themself… suggesting internal discovery and reflection.

• The pointed comment of the headline makes the message personally relevant to each reader or potential user.

• Appeals to universal human curiosity about our true selves and blind spots.

• Provokes an emotional response without being explicitly positive or negative.

• Delivers a profound philosophical concept accessible to anyone.