Your profile pics are basically your entire dating life. Bad pics = no matches. Good pics = tons of interest. It really is that simple. Most people have no clue what makes a good hookup profile pic.
First rule: no group photos as your main pic. Nobody wants to play "guess which one you are." Lead with a clear photo of your face. Smile, look approachable, and for the love of god, no sunglasses.
Your main photo should be recent, well-lit, and show your face clearly. Natural lighting is your friend. That golden hour glow makes everyone look better. Bathroom mirror selfies with your phone covering half your face? Nope. Get someone to take the photo or use a timer.
Second photo should show your body. Not a shirtless gym selfie (unless you're absolutely ripped and even then, be careful). A beach photo, you playing sports, or doing something active works great. People want to see what they're getting into.
Third photo should show you doing something interesting. Travel pic, at a concert, with a cool hobby. This gives people something to message you about and shows you're not just sitting home all day.
What to avoid: fish pics (unless fishing is literally your whole personality), photos with your ex that you cropped out (we can tell), photos with kids that aren't yours, gym mirror selfies with a dirty mirror, and photos that are clearly 5+ years old.
For guys: get a photo that shows you can dress well. Doesn't have to be fancy, just shows you put some effort in. Clean shoes, clothes that fit. Also, one photo with a dog works magic if you have access to one.
For girls: don't use just face shots. Include at least one full body photo. Guys will assume you're hiding something otherwise. Also, the "Instagram baddie" look might get matches but think about what kind of matches you want.
Everyone: variety is key. Don't use 6 photos that all look the same. Different settings, different outfits, different vibes. And please, no filters that change your face. Light editing is fine, but if you look completely different in person, that first meetup is going to be awkward as hell.
The vibe of your photos should match what you're looking for. If you want something casual and fun, show yourself having fun. If you're looking for slightly more connection, include photos that show your personality and interests.
And update your photos regularly. If your most recent photo is from 2019, you're basically catfishing. People want to know what you look like now, not 5 years ago.