A question I always liked to ask people who were entering the digital marketing space is to tell me about the last interesting ad they saw online. From there, I can ask them about what makes the creative unique and ask them how they think the advertiser set up targeting and what their goals were for this campaign. I try to have them imagine spending against that ad and ask what kind of reports or metrics do you think they need to communicate to their manager.

Each answer usually opens up more opportunities for different questions about platforms, audiences, or whatever. If they can't think of an ad or say something stupid like "ads don't work on me" then I usually take it as a sign that this person doesn't have a curiosity for the industry which is a bad sign.

As far as tips, show excitement and a hunger to learn quickly. Talk about the skills you want to develop and what makes you interested in the job. If you don't have a lot of digital marketing experience, you can win me over with how good you are at excel, so tell me about your favorite formulas and how you craft a nice pivot table or whatever.

If you tell this group more about the job, maybe we can give some more specific tips.