Quick answer: Use bookmarks for websites you return to, Notes for things you write yourself, and screenshots only for something you need to see exactly as it looked. For information you want to find again later, save it as searchable text with a name.
Most people pick whichever is fastest in the moment. Each one is good at one job and bad at the others.
The quick comparison
| Good at | Bad at | |
|---|---|---|
| Bookmarks | Sites you revisit on purpose | Anything that isn't a web page in Safari |
| Notes | Your own writing and lists | Staying organized as links and files pile in |
| Screenshots | Proof of exactly what a screen showed | Being found again by topic |
Bookmarks: for sites, not information
A bookmark is perfect for your bank, a tool you use weekly or a favorite recipe site. It's Safari only, and it's the wrong place for a single fact you'll need once. Bookmarks vs Reading List.
Notes: for things you write
Notes is great for lists, drafts and meeting notes, and it syncs across your devices. It gets messy when it becomes the place for every link and screenshot too, because nothing enforces structure.
Screenshots: for proof
Use a screenshot when the exact look matters: an order confirmation, an error message, a price. For everything else, a screenshot is slow to find. Photos can search text inside images, but your screenshots still compete with thousands of photos.
What to use for "I'll need this later"
The common case, like a code, an address, a link someone sent, or a PDF, fits none of the three well. It needs to be saved fast from wherever it is and found by a word later. That's what Snugit is built for: one tap from the share sheet, one search bar to get it back.
Try Snugit free for the things that aren't bookmarks, notes or proof.