BrowserLab is a cross-browser compatibility testing tool, featuring multiple viewing and comparison.

A browser is needed and used to view a web page.  Everyone  is a PC or Mac. Then it is a choice of browser to view the internet via (IE)  Interner Explorer, Safari, Windows, Chrome, Firefox, and many others and then there are many versions of each browsers depending on when the viewer last upgraded their browser.

So why is it important to always check and see how your website looks in various browsers?  It is a “must do”  every time you make a major change to your website.  It is critical since your web site may look great in IE and have bugs or fail in Firefox.  Or for viewers who are  in older versions (meaning they have not updated to the latest version) of browsers, your new graphics may look different, have bugs or  fail. 

It is also all about readability, finding out if your web page size fits the browser.  It will also allow you to check font metrics and size across browsers with an overlay that will show you exactly the areas that are the same and what will change.  If you are looking to control brand consistency across the web, then this is an area to drill down on.

BrowserLab provides web designers exact renderings of their web pages in multiple browsers and operating systems.  Here is a link to their free tool for a limited free preview of Adobe® BrowserLab.   Your web designers should know  this and other companies provide this service.