Travel site needs articles for travel destinations, they provide the topic, the title, and also a list of keywords that need to be used for SEO purposes. Some of these long tail keywords can be used as subtitles, others have to be in the content area, that would be up to you. So for example, if an article has to be about “Things to do in Austin” they would tell you the number of words it needs to have (usually 2000-3000) and would provide an excel sheet with keywords. They are looking for at least few articles in a month.