Here is a cool explainer for an Advertising Agencies.
There are 12 services included. You can simply add or remove any of them. Or you can put your own service and edit the text as you want.
Web Design and Development.
Content Management System.
E-commerce and shopping cart development.
Domain Registration & Hosting.
Search Engine Optimization.
Social Media & Online Marketing.
Mobile Applications Development.
Networking & Hardware Solution.