PMF is not a single moment, it is a spectrum. A team can have PMF for one segment and not another, or for one use case and not adjacent ones. The diagnostic is segment-specific: ask "which 40% of users would be very disappointed if this product disappeared tomorrow" (Sean Ellis's test). The intersection of high VS-disappointment and high engagement is the PMF zone.
The landing page is one of the cleanest external signals of PMF. A page that converts well below benchmark on warm traffic suggests either a positioning failure (the audience does not understand what this is) or a fit failure (the audience understands but does not want it). Distinguishing the two requires scoring the page itself.
Pre-PMF, the page should be in service of learning — short, hypothesis-driven, easy to change. Post-PMF, the page becomes the most-trafficked asset in the funnel and the highest-leverage to optimize.
How Lytms scores it
Lytms does not measure PMF directly. It scores whether the landing page is doing its job at communicating the product's value to its intended audience — which is one of the leading-indicator signals of PMF strength.
See also
See product-market fit on your own page.
One URL. About 2 minutes.