PPC is one of the best ways to advertise your business and drive sales and traffic. In short it works like this: When someone searches for a specific keyword phrase or product/service on a search engine, advertiser PPC ads are rendered along with the search results. Ads are populated in the serp’s (search engine results page) according to quality score and relevancy. The great thing with PPC is that you only have to pay for actual clicks made on your ads.

PPC is a type of sponsored online advertising that is used on a wide range of websites, including search engines, where the advertiser only pays if a web user clicks on their ad. Hence the title, ‘pay per click.’
When our clients ask us to define Pay Per Click, we tell them that PPC is a very cost-effective means to get their site noticed by their target audience while our other Internet marketing strategies are gradually helping their site achieve their natural ranking potential.

Pay per click (PPC) (also called cost per click) is an internet advertising model used to direct traffic to websites, in which advertisers pay the publisher (typically a website owner) when the ad is clicked. It is defined simply as “the amount spent to get an advertisement clicked."

With search engines, advertisers typically bid on keyword phrases relevant to their target market. Content sites commonly charge a fixed price per click rather than use a bidding system. PPC "display" advertisements, also known as "banner" ads, are shown on web sites or search engine results with related content that have agreed to show ads.

In contrast to the generalized portal, which seeks to drive a high volume of traffic to one site, PPC implements the so-called affiliate model, which provides purchase opportunities wherever people may be surfing. It does this by offering financial incentives (in the form of a percentage of revenue) to affiliated partner sites. The affiliates provide purchase-point click-through to the merchant. It is a pay-for-performance model: If an affiliate does not generate sales, it represents no cost to the merchant. Variations include banner exchange, pay-per-click, and revenue sharing programs.

Google may providing urlbuilder tool as default, you can submit your url there and took that designation url and submit it there. and then you came to know that how many campaigns are ste to domain without entering into adwords but by google analytics.