Malware is a truth in online trades, so malware avoidance and a safe website for clients would be high on your list of importance. You get one chance to create a first impression, and your website is sometimes your only chance. If a client visits your website and catches that it has been marked as actually harmful, the impression has been made and that client may never return.
The risks to Web sites have improved exponentially, due in part to huge quantity of associations building their sites on lightweight and unsafe platforms, or presenting their sites within at risk hosting environments. Even when sites are built by expert development businesses, security tends to take a backseat to functionality, reasonable, limits and creative value.