Very few people will buy a product the first time they see it. They’ll have questions they want answered and more important, they’ll want to have some trust in you, your blog, and the product you’re promoting. Look at your own purchasing habits. Whether you’re shopping online or offline, you rarely make impulse purchases. You always have some question you need answered. And you never open your wallet until you trust in the product you’re buying and in the person you’re handing your money to.
The best way to build trust and credibility is to create lots of high-quality contents that honestly answers those questions and provides useful information about the product you’re promoting. You need to build trust and credibility everyday not only because you want to sell but also because that is your habit. It shouldn’t be a one time thing but a continuous effort.