Getting people to your site is one thing. Getting them to buy/convert on their first visit is another.
But should you expect them to buy on the first visit? Often not. Often their first visit is just part of their research journey. They are still deciding what and if to buy, and your site, because you market it well, popped up and they visited… before leaving.
“Why didn’t they buy?” you ask as you review your website stats. Because they have not yet made the decision to buy is often the answer. They are still researching. The timing is not yet quite right. They may not make a decision for a few hours, days or weeks. Remember, the buying process is quite often very complex, involving research such as visiting shops, reading reviews, choosing options, oh and saving up!
So, the question is often not, “how can I get the visitor to buy?”, but “how can I get the visitor to return when they are ready to buy?”