Google Adsense

If you ever go through sales training for a job, you’ll learn
that the customer has to trust you in order to buy from you.
This isn’t any different with a website. It’s hard to build
credibility when you don’t have the chance to meet them in
person and let them see your smile or get to know you a bit,
but that doesn’t mean it can’t be done.
Too many ads on a site are the equivalent of spam in email.
If your page has too many ads, it makes every ad you have
less credible. Instantly, your customers do not feel like you
are trustworthy, and they’ll probably leave your site
immediately for fear of adware being installed on their
computer. Your site should be about the content, not about
ads.
If your site is getting a lot of traffic, you’re going to be very
successful with targeted ads from AdSense. Stick with it
and don’t participate in every popular ad bank out there. It
will cost you ad revenue because it will make you less
credible.