Most pages do not fail because of one dramatic error. They lose momentum through small mismatches: vague copy, weak proof, slow media, confusing forms, and an unclear next step.
Promise problems
The first three mistakes all live in the hero, which is where the largest share of visitors decide whether to keep reading.
- The headline describes the company instead of the visitor’s outcome. “A modern growth platform” tells a buyer nothing about what changes for them.
- The page breaks continuity with the ad, email, or search query that produced the click, so the visitor has to re-establish that they are in the right place.
- The offer is abstract. Nobody can picture what arrives, how long it takes, or what it costs, so the safest choice becomes leaving.
These are cheap to fix and expensive to leave alone. Rewrite the headline as an observable change for a named audience, repeat the campaign promise verbatim, and state the deliverable plainly.
A useful check is the five-second test: show the first viewport briefly, then ask what the page offers and to whom. If the answers are wrong or hesitant, no section further down will compensate.
Trust problems
The next three mistakes are about credibility, and they tend to be invisible to the team that built the page because that team already believes the claims.
- Proof is generic. An anonymous quote praising a great experience carries almost no weight next to a specific claim.
- Evidence is far from the claim it supports, stacked in one trust section near the footer where it arrives after the decision.
- The strongest claims are the least supported—big numbers with no source, or results the buyer cannot verify.
The fix is placement and specificity. Move evidence beside the claim it validates, attribute it properly, and remove anything you cannot substantiate. Where results are unavailable, substitute process evidence: documented method, sample deliverables, real screenshots, visible expertise.
Silence about risk is its own trust problem. Pages that never mention cost, timeline, effort, or fit read as unwilling to be pinned down, and experienced buyers notice.
Interaction problems
Three more mistakes are mechanical, which makes them the easiest to overlook and the most consistently costly.
- The page is slow where it matters: a huge hero image, blocking fonts, and third-party scripts ahead of the content.
- The layout shifts as assets arrive, so buttons move under thumbs and readers lose their place.
- The form asks for more than the next step requires, or fails without explaining what went wrong.
Fix them in that order. Size and preload the hero, defer non-essential scripts, reserve space for anything loading late, then reduce the form to the fields your team genuinely needs and write error messages that name the problem and the remedy.
Test in imperfect conditions rather than in a design tool. Throttled network, older phone, autofill, keyboard open, one thumb. Most interaction mistakes are only visible there.
Decision problems
The final three mistakes appear at the exact moment the visitor is ready to act—the most expensive place on the page to lose someone.
- The page offers several competing actions at equal weight, so the visitor has to choose a path instead of taking one.
- The button says nothing. “Submit” and “Get started” leave the outcome unstated right where certainty matters most.
- Nothing explains what happens after the click—who responds, how quickly, and whether anything is obligated.
Rank the actions explicitly, give the primary one an honest label that names the deliverable, and add one short line about response time and next steps beside the form.
The twelfth mistake sits underneath all of them: nobody owns the page after launch. Without measurement of qualified outcomes and a scheduled review, a page decays quietly—offers go stale, links break, and the campaign that funds it keeps paying full price for a page nobody has read in months.
Audit the page as a sequence of questions and actions. Remove every moment that makes a qualified visitor pause for the wrong reason.
Sources and further reading
Our guidance is informed by current primary and research-led resources, including Google’s Web Vitals documentation, Google Search’s people-first content guidance, Nielsen Norman Group’s form usability research, and Baymard Institute’s form and checkout research.