C2A stands for "Call to Action".
Visitors to your website can be very anonymous. Often they merely browse or defer whatever they were searching for. If a site lacks C2As, there is less chance of them making that vital contact with you.
A C2A is anything on your site that may prompt a reaction from a visitor. A phone number, link to another product or service, download a catalogue, sign up for a newsletter or a special offer.
A site without C2As relies on the visitor making some sort of contact at a later date. There again they may not.
<>An effective website has a number of calls to action, and they need to be prominent.
Depending on your business model, avoid being too aggressive with C2As. A happy balance is essential.
Having trouble with this issue, why not book a Consultation.