Optimising landing pages or building new ones: which to buy

Optimise what exists when you have traffic arriving at pages that underperform. Build new ones when you have campaigns with nowhere appropriate to send them. Most brands buy the wrong one, because building feels like progress and optimising feels like admitting the last build was wrong.

Start with the arithmetic, not the preference

Pull your paid landing pages and sort by spend. Then look at conversion rate and revenue per session for each.

If your highest-spend page is also among your worst-converting, that is an optimisation job and it is urgent. Every day it runs unfixed costs you the difference across the whole budget pointed at it.

If your campaigns are all landing on the homepage or a generic collection page because nothing more specific exists, that is a build job. No amount of optimisation makes a homepage the right destination for a campaign about one product.

Most brands have both. The sequence matters: fix the high-spend underperformer first, because the return is immediate and it applies to money already committed.

What optimisation actually reaches

Message match. The largest single effect available on most paid pages and the least often tested. The visitor arrives with an expectation set thirty seconds earlier by an ad. If the page opens with generic brand language, the mismatch costs more than any layout change will recover.

Form length. Steep and well documented. Analysis of Unbounce’s 2026 benchmark data shows three-field forms converting at 10.1% against 3.6% for nine-field forms, and HubSpot research cited by LeadsuiteNow puts three-field forms at 25% completion against 15% at six, with each field costing roughly 11%.

Speed. Which on paid traffic costs you twice. Analysis of 2026 benchmark data indicates a page with poor Core Web Vitals can pay 22% more per click than a faster competitor bidding on the same keyword. Roughly 70% of audited landing pages fail Core Web Vitals, so the odds are you are paying it.

Above-the-fold offer clarity. Paid visitors have no loyalty and no patience.

What only a build reaches

A page that does not exist. If you are launching a product, entering a segment or running a campaign around a specific use case, there is nothing to optimise.

Building is also correct when the existing page is structurally wrong rather than underperforming: a page designed for warm traffic being used for cold, or a page carrying six competing calls to action because it was built as a catch-all.

The mistake that wastes the budget

Building a new page to replace one that was underperforming for a reason nobody diagnosed.

The new page inherits the problem, because the problem was the offer, the traffic quality or the message match rather than the layout. Six weeks and a build budget later, the number is roughly the same and the conclusion drawn is that landing pages do not matter.

Diagnose first, even if the answer turns out to be build. It takes an afternoon: click your own top-spending ad on a phone, off wifi, time the load, and read the first line of the page against what the ad promised.

What either one is worth

At a supplements brand we work with, paid landing page conversion improved by 40% with no change in media spend. Same campaigns, same audiences, same creative, landing somewhere that worked better.

On a paid-heavy funnel that is not a conversion result, it is a media efficiency result. A 40% improvement in landing page conversion has the same revenue effect as a 40% budget increase, except it does not recur as a cost and it applies to every future campaign pointed at that page.

One caution on building. A new page needs traffic to prove itself, and a brand-new landing page will look worse than an established one for the first fortnight simply because the campaign feeding it is still learning. Judge it at four weeks, not at four days.

Scope for both paths, and the diagnosis that decides between them, sits under landing page optimization for paid traffic.