An invitation card is used to invite people to events such as birthday parties, success parties, anniversaries, weddings, and so on. It must include the date, time, and any other pertinent information about the event. A well-designed and well-thought-out invitation conveys your eagerness to welcome and amuse your guests. Invitations can also be used as a marketing and public relations technique in the corporate world to improve ties with clients and other market stakeholders.