Mobile app development is the act or process by which a mobile app is developed for one or more mobile devices, which can include personal digital assistants, enterprise digital assistants, or mobile phones.
Search engine optimization (SEO) is the process of improving the quality and quantity of website traffic to a website or a web page from search engines.
Short Message/Messaging Service, commonly abbreviated as SMS, is a text messaging service component of most telephone, Internet and mobile device systems.