A new site’s first ranking pages matter more because they establish what the site is about and prove it can satisfy users, which seeds the topical credibility and trust that every later page inherits. The mechanism is that early wins build a foundation: when your first pages rank and the searchers who arrive are satisfied, the site accumulates evidence that it covers a topic competently, and that evidence makes the next pages rank faster and more easily than they would on a domain with no track record. This is observed compounding behavior rather than a documented rule, so treat it as a strong pattern worth watching in your own data.
The assumption to drop is that every page is weighted the same regardless of when it was published. On an established, trusted site that is closer to true, but a new domain starts with nothing to vouch for it, so the first pages are doing double duty. They are not only trying to rank for their own query, they are also defining the site’s topical identity and demonstrating, for the first time, that this domain produces content worth ranking. A trusted domain inherits that credibility before a new page is even crawled; a new site has to earn it, and the first pages are where it gets earned.
Because of that, the first wins compound rather than stand alone. Each early page that ranks and performs well reinforces the topic the site is becoming known for, and that reinforcement is what helps the second wave rank quicker and the third quicker still. Spread your strongest effort across forgettable, off-topic, or thin early pages and you teach the system little, slowing everything that follows. Concentrate it on focused, genuinely strong pages and you build authority the later pages can lean on.
For a new site, make your first pages your best and most tightly focused work, all clearly within one topic so the early wins reinforce a single identity. Resist the urge to publish a sprawling mix at launch, and instead pour effort into the handful of pages that will define what the site is for, then let the trust they earn carry the rest.