1. Sign up for an AdSense account by visiting google.adsense.com, and clicking 'Sign up now.' Complete the online form which asks you a few questions, including your website address.
2. Log in to your new AdSense account. You will be presented with a report of your AdSense earnings so far, along with some other information regarding your ads, such as the amount of impressions your ads have received and their estimated revenue per 1,000 impressions.
3. Click 'AdSense Setup' from the menu bar near the top of the page. Then click 'Get Ads'. This is where you create and customize your ads, ready for publishing on your site. The pages that follow allow you to define whether you want image or text ads, and to make a number of customizations to their appearance. Select the size and shape of the ad you want, and then choose the colors and fonts. A preview shows you how the ad will look when live. When you're satisfied with how it looks, click 'Continue.'
4. Select 'Add new channel.' When prompted, input a name for this ad. This should be something descriptive so that when you are looking at your earnings reports you'll be able to see easily which ads are bringing in the revenue. Click 'Continue' when you've chosen a name.
5. Click 'Submit and Get Code.' The next page that appears presents you with some JavaScript to insert into your website's HTML source code. Some knowledge of HTML is required to position the ad unit where you want it to go. If you are unsure, either seek advice from someone with HTML knowledge, or download the source code of the web page to your computer and load this file into a browser. This allows you to test the positioning until you have it in the right place. When you know where you want it to go on your live site, copy and paste the code into the relevant location.
6. Load your Web page in a browser and check the results. If an empty space appears instead of your ad, wait a few minutes and check again. It may take a little time before Google serves the ads to your site.