Text mistakes that make your site or ad lose customers

Published September 6, 2026 · 4 min read

Edson Feitosa de Oliveira Junior Founder & Lead Engineer · PruPru Digital Services

Spelling mistakes, confusing text, or incomplete information on a site give the same impression of carelessness as a messy physical store — even if the product or service behind it is excellent.

The most common mistakes

• Spelling and grammar errors, which immediately undermine credibility
• Overly generic text ("quality and commitment") that says nothing concrete about what the company offers
• Missing essential practical information: price, timeframe, payment method, service area
• Very long text with no paragraphs or highlights, hard to scan quickly
• No clear call to action at the end of the text (what should the visitor do now?)

How to write better without being a professional copywriter

Write as if you were explaining to a customer in person: direct, no fluff, answering the questions they'd actually ask (how much does it cost, how long does it take, how does it work). Always review before publishing, or ask someone outside the project to read it first.

Bad text also hurts paid ads

In Google Ads or social media ads, confusing text reduces the click-through rate and increases the cost per result — you pay the same (or more) for an ad that converts worse just because of the copy.