Vinted
First thing is you go to profile - personalisation.
Tell it there what sizes you want to see, and then start listing and ticking any brands that you want to see - I like some higher end high street, so I have Nobody's child, Wyse, Aligne, Tallulah and Hoe, Greek Archaic Kori, things like that. Just list as many as you can think of.
This doesn't stop other things coming up on your feed, but it does help.
Next step is to remember that Vinted is an algorithm - if you look for it, it will bring it up again. If you stop looking, it will stop. If you search a random thing- a kids dress- you will get flooded with kids dresses until you teach it youre not interested.
So start by picking a brand, or a style that you like. Pick one of the brands you've chosen, or boho, or vintage silk, or dopamine, whatever floats your boat and kind of fits your style.
It'll bring up a million things that use your keyword. Filter down to any sizes you might want to see- remember that some people might see a large label, but tick M/ 14 instead. Filter condition too.
Then favourite away. You want to just heart anything that's vaguely what you might like. If you see anything that's actually what you like, then engage with it- open the listing, open the more information button, take a few seconds reading, then favourite it before you move on. Remember that if there's anything you DONT want- scroll by quickly.
Once you've spent a few minutes doing that, come out of Vinted, and leave it for a little while. Then go in, try a different brand, and do it again. If you can do it for several brands, great.
Once you've done this a few times, you should see your feed starting to improve a little, so spend a bit of time scrolling through that, and open anything interesting- if you engage, it gives you more of the same. You should be able to clear your favourites of some of the stuff you've liked, and start favouriting what you might actually be interested in again.
It's as simple as that. Just remember- if you search for something, it keeps on giving you it. If you engage with it by looking, it gives you more. So look for the one kids dress that you want, then don't look again! And then spend some time going back to looking for what you want.
Also- at the top, there are tabs for women's, mens, etc- these still follow your feed, so use them and they'll stop you seeing the other categories.
At the minute my feed is filled with leather jackets and bags- which I keep getting distracted by! I need to do some searching for other things, but they pop back out of your brain if you need them.
Make sure you save your favourite searches, and try and check them if you open the app once every day or two, and you'll get them up on your feed as soon as they're listed.