Why it matters
Google runs the axe accessibility rules against the page as a phone renders it: colour contrast, names on controls and links, labels on form fields, alt text, headings and landmarks. The score is the weighted share of those rules the page passes. Accessibility is also law in more places each year, including the European Accessibility Act since June 2025.
How to fix it
Start with the failing rules listed: they are ordered by how much each one weighs. Contrast and missing names are usually a stylesheet change and an attribute.