With more and more web traffic coming from mobile devices, it's more important than ever to make sure your website is mobile-friendly. A website theme or format that adjusts its display depending on the screen size is called a responsive site. I'm sure you've visited sites on your cell phone or tablet that don't display properly. When that happens you probably leave the page. You don't want that happening to your site!
You can test your site on your desktop or laptop. Bring up your site in a browser window, then slowly decrease the size of your browser window by clicking and dragging in the side. If your site is responsive, you will notice the display changing as the screen size changes. If it doesn't, you may want to give your web developer a call.
Coming into the holiday season our website was only partially responsive. Some things looked ok, others not so much. Unfortunately the Wordpress theme we were using was no longer being updated, so our best option was to choose a fully responsive theme and redo the website. We kept the pages and content, but put them all in a new theme that responds beautifully on multiple devices.
Your website is the first interaction you have with many prospective clients. Make sure you put your best foot forward with a fully responsive website.