Abstract: Techniques are provided to perform skills, expertise, abilities and interests tagging in in a software (e.g., social networking) environment. Interactions of a user are monitored in a software environment in which information about users is collected based upon user actions. Textual information about or derived from an interaction of the user is obtained. A skill noun is determined from the textual information obtained for the interaction. The determined skill noun and a skill verb are combined to form a user skill tag. A profile of the user is updated with the user skill tag.