Journalistic things have to do with writing or reporting about the news. Most journalistic stories are found in newspapers or magazines, or on news-related websites.
Years ago, a journalistic job would probably be writing for a daily newspaper, or possibly reading the news over the radio. Today a journalistic career could include writing articles for various online news sites or taking photographs of current events for a magazine, or even recording an interview for a podcast. Most journalistic work is done by journalists, meaning "writers or broadcasters of the news."