1. Browse to the Google AdSense website and click the 'Sign Up Now' button to register for a new account. Follow the prompts to create a Google Account, if needed, and enter your website information and postal address.
2. Click the 'My Ads' tab, and then click 'Content,' 'Mobile Content' or 'Search' to choose the type of ad unit or custom search engine you want to create. Click the 'New Ad Unit' button or 'New Custom Search Engine' button to continue.
3. Use the menus to design the ads or search engine you want to display. For example, click the 'Ad Size' drop-down menu to specify the measurements of your ad, click 'Ad Style' options to design a color scheme layout and enter keywords in the Custom Channels or Keywords text box.
4. View the preview of your ad unit or custom search engine that automatically displays. When ready, click the 'Save and Get Code' button and then copy the code that appears.
5. Open your website or mobile Web page file in a text editor and paste in the code. If embedding a custom search engine, paste the code in an area, such as the sidebar, where you want the search mechanism to appear. Save your document and upload it to your Web host to publish your Google AdSense units.