Open your own website on your phone — on mobile data, not the office Wi-Fi.
That's how most of your customers meet you. Not on a 27-inch monitor on fibre. On mobile data the things nobody notices in the office become obvious: images that take five seconds, a menu that fights your thumb, a phone number you can't tap.
I've checked a lot of sites this year. The problem is almost never the design. It's weight — uncompressed images, scripts that block rendering, no caching. All fixable, usually in an afternoon.
If you want a second pair of eyes on yours, we do that check for free: https://TechBiz.ae