User experience ( UX ) refers to a person's emotions and attitudes about using a particular product , system or service. It includes the practical, experiential, affective , meaningful and valuable aspects of human–computer interaction and product ownership. Additionally, it includes a person’s perceptions of system aspects such as utility, ease of use and efficiency. User experience may be considered subjective in nature to the degree that it is about individual perception and thought with respect to the system. User experience is dynamic as it is constantly modified over time due to changing usage circumstances and changes to individual systems as well as the wider usage context in which they can be found. In the end, user experience is about how the user interacts with and experiences the product.

Digital electronics or digital (electronic) circuits are electronics that operate on digital signals . In contrast, analog circuits manipulate analog signals whose performance is more subject to manufacturing tolerance , signal attenuation and noise . Digital techniques are helpful because it is a lot easier to get an electronic device to switch into one of a number of known states than to accurately reproduce a continuous range of values.

Users typically access social media services via web-based technologies on desktops and laptops , or download services that offer social media functionality to their mobile devices (e.g., smartphones and tablets ). As users engage with these electronic services, they create highly interactive platforms through which individuals, communities, and organizations can share, co-create, discuss, and modify user-generated content or pre-made content posted online.