It is very hard to explain what a bounty is to many people who aren't in the industry. I think the best way to explain is that it is a micro task that you do and get paid for each task whether it's sharing on twitter, commenting. I think using the word micro task will be easier to explain.
It easier to say an online advertising or a marketing work that is related to bitcoin and other altcoins, cause the first thing they will think about campaigns specifically signature campaign are signatures we are doing on physical activities or work, signature campaigns for donations, petition, surveys and political agendas, most of the people in my county have no idea about ICO projects, bounties and social media campaigns, they just know that it is an investment scheme or a bitcoin investment.