Design gets the budget. Copy gets the results. In published research on landing pages, the correlation between copy quality and conversion rate was stronger than the correlation between design quality and conversion rate. Yet most teams spend weeks on visual design and 30 minutes writing the copy. It shows.
The data is clear on what works: simpler copy converts better. The top-converting pages in published benchmarks write at a 7th-grade reading level (Flesch-Kincaid). The median page writes at a 9th-grade level — above the comprehension comfort zone of most adults. Every grade level you drop in readability correlates with a 4% increase in conversion rate.
Headlines carry disproportionate weight. The median visitor spends 2.6 seconds reading the headline and forms a stay-or-leave judgment within 3 seconds of landing. Pages with clear, benefit-driven headlines between 6-10 words convert 28% higher than pages with vague or overly long headlines.
This page breaks down the copy statistics that matter — headline length, readability, word count, and the specific patterns that separate high-converting copy from the rest.