Open your web site in your browser.
Now hold your business card, your letterhead and a photo of your company vehicle (or any 3 branded ‘things’) next to it.
Are they all INSTANTLY recognisable as being from the same company?
If they are – congratulations, you are doing better than most.
The credibility you built during your last encounter comes with any visitor to your web site. You have a platform of trust from which you can launch a credible sales message.
If not – you may have to start building your recognition and credibility from scratch for every visitor to your web site.
Now would be a good time to brand your web site consistently with your business cards, letterhead, signage, …
(Your brand-friendly web design company can help!)