Wireframes are good because they help you achieve purpose.

Without a wireframe your website design is a pretty picture.

Whatever the goal of your business or organisation you will not achieve it with a pretty picture.

Where to start?

Weather you want to sell thousands of products each month or become the leading source of information on a your chosen topic - a good designer will sit with you and work out your goals.

 Wireframes lack explicit detail, wireframes are good because they lack explicit detail. Because they lack details it gives you chance to work out what content types you require on your website and where the key information needs to be.

And because your wireframes take considerably less time to create than a photoshop or fireworks mockup you can quickly make amends at a much lesser cost to your time or project budget.

And then when you then make you pretty little Photoshop picture.

Everything will be in its right place and the clients website has more chance of succeding.