A redesign makes your site look better. It also, almost always, breaks something that used to work. New design, new code, new bugs — that's just how it goes. Before you celebrate, check the things a redesign most often damages.
Links that used to work
Redesigns rearrange pages, and old links break. Every internal link and every button needs a quick pass.
Forms
New templates frequently disconnect the form from wherever it used to send. Submit a real test and confirm it arrives.
Checkout
If it's a store, run a complete test purchase. Design changes love to hide the pay button or break a step on mobile.
Old URLs and SEO
If page addresses changed, the old ones may now 404 — losing the search ranking you spent years earning. Redirects matter.
Mobile
A design that looks perfect on your big monitor can fall apart on a phone. Check it there specifically.
Speed
New sites often load heavier — big images, extra scripts, animation. Make sure "prettier" didn't become "slower."
The pattern is always the same: the visible stuff gets attention, the working stuff gets assumed. An independent post-redesign check catches what the excitement glossed over — before a customer finds it first.