Dawg's response did not give an accurate idea of what it takes to be featured at all. If anything, it gives some idea of what's popular on here. Tapas has featured a lot of stuff that doesn't fit into that list.
The spotlight is mostly luck, creating good content and catching their interest, I think. Or if you're an already popular creator and you just launched some collab work/premium comic in relation to tapas (See: Cheshire Crossing).
I've heard of someone who approached them and asked for a feature and got it, but I doubt that would work for most people at all. If it did, everyone would be flooding tapas with emails like that and then they're pretty much sure to not be noticed.
Tapas can't feature everyone that wants to be featured. That would destroy the effect of a feature.
Don't rely on any site to get you seen. That's your job to do. People who are popular right now struggled through that process once upon a time, and so will you have to if you want to achieve what they have.
Instead of focusing on the very small chance of being spotlighted (GoldenPlume has mentioned the statistic likeliness multiple times but I can't name it off the top of my head) and hanging all of your hopes on that, look at what other people in various parts of the industry did to get where they are and use their examples to carve your own way.
Plus, you are more likely to get noticed by a company, whether that be webtoons, tapas, smackjeeves or a local publishing company, if you have a few years experience in the business and have built up your own audience.
Which is kind of fair. It's how other business fields work too. When a manager at mcdonalds quits, who do you think they'll promote to replace their position? The guy who started just this month on fries, or the guy that has worked there for 5 years and always comes in on short notice whenever there's a crisis?
Just make your comic, enjoy what you do, post on several sites and keep trying to improve.
