Does anybody know the best way to implement PayPal service at your website?

Paypal offers easy and simple ways to use their wide spectrum of services and one among best is to publish a 'add to cart' button on website just by following simple steps to create a new shopping button.

Sorry to say, your question is not pretty much clear. What do you want exactly to ask?

 

Paypal documentation has explained its implementation very well on their website.