A roadshow is a series of presentations made in various locations leading up to an initial public offering(IPO).The roadshow is a sale pitch or promotion made by the underwriting firm and a company's management team to potential investors before going public.A seminar is a form of academic instruction, either at an academical institution or offered by a commercial or professional organization.It has the function of bringing together small groups for recurring meetings, focusing each time on some particular subject, in which everyone present is requested to participate.A seminar may be defined as a gathering of people for the purpose discussing a stated topic.Such gatherings are usually interactive sessions where the participants engage in discussions about the delineated topic. The sessions are usually headed or led by one or two presenters who serve to steer the discussion along the desired path. A conference is generally understood as a meeting of several people to discuss a particular topic. It is often confused with a convention, colloquia or symposium. While a conference differs from the others in terms of size and purpose, the term can be used to cover the general concept. A convention is larger than a conference; it is a gathering of delegates representing several groups.