Mendeley is a citation manager that allows users to build a personal database of research articles, organize and annotate the articles, and generate citations in various styles. It offers both desktop and online versions that automatically sync. Users can import articles, organize them in a library, highlight and take notes, generate citations, and collaborate with other researchers by inviting them to join groups. Mendeley has pros like compatibility across platforms and automatic syncing, but cons include limited free storage and inability to annotate on the app. It has practical applications for dietetic interns in researching client questions and building an organized personal database.