Icons, symbols, and what they actually mean
You see them everywhere on dashboards, in documentation, in UI kits. They are tiny, usually monochrome, and completely assumed to be self-explanatory. In practice, that assumption is where things go wrong. I once had a client who spent three days debugging a deployment pipeline because their monitoring dashboard used a bell icon for both "alerts" and "notifications." The two were handled by completely separate services, and nobody on the team had ever documented which was which. They looked the same. They worked differently. The problem is rarely the symbol itself. It is the gap between what the designer thought it meant, what the developer thought it meant, and what the end user actually understood. When you are trying to figure out o que elas representam, you are really asking how to close that gap before it becomes a support ticket.
How to decode what they represent
Start with context, not the shape. A magnifying glass means search inside a toolbar. It means investigate inside a security panel. It means nothing outside its container unless someone has written it down. I keep a simple spreadsheet for every project: symbol, context, defined meaning, and the person who approved it. It takes about ten minutes to set up and saves hours when someone new joins the team three months later and asks why a flame icon means "featured" instead of "hot bugs." Look at the surrounding elements too. Symbols rarely live in isolation. If a checkmark appears next to a payment form, it means successful transaction. If it appears next to a file list, it means selected. The meaning shifts based on adjacency. This is one of those things that seems obvious until you are looking at a design system with 400 icons and no documentation. That happened to me. We solved it by exporting the entire library and running it through a simple script that matched each icon to its nearest label text in the source code. It took about twenty minutes and caught twelve mismatches we had not noticed.
There is also the issue of cultural variation. A hand gesture that means "good" in one region means something entirely different in another. A envelope icon for "message" works almost universally now, but older conventions still pop up. A speech bubble, a inbox, a stamp. These all coexist in different systems and mean the same thing. Beginners usually pick one and stick with it without realizing that switching between conventions mid-project confuses users more than any inconsistency would.
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Common mistakes that waste time
The biggest one is assuming semantic clarity without testing it. You can spend an hour picking the perfect icon from a library and still be wrong if no one has actually verified it. I recommend a quick five-person test before locking anything in. Show each symbol without labels and ask people to write down what they think it means. If three out of five interpret it incorrectly, redesign or add a label. This usually takes twenty minutes and catches problems that would otherwise surface during production incidents. Another mistake is mixing style families. Outline icons next to filled icons next to gradient icons in the same interface creates visual noise that makes recognition harder. The brain has to process different rendering styles before it can even attempt to decode the meaning. Keep it consistent. Pick one style and stick with it across the entire project.
Sometimes the symbol itself is not the problem. The problem is the interaction model around it. A trash can icon is universal, but if clicking it deletes without confirmation, that is a UX failure, not a symbol failure. Users will blame the icon for your missing safety net.
When symbols fail and what to do instead
They fail most often in highly technical domains where the audience is small and specialized. A circuit board diagram icon means nothing to a general user and everything to an engineer. In those cases, fallback text is non-negotiable. Always pair the symbol with a label, at least on first exposure. After repeated use, users build intuition and the label can be hidden. But never assume that intuition exists before it is earned. If you are maintaining an existing system and cannot add labels, consider a tooltip on hover or a brief onboarding walkthrough. Both take minimal development effort and dramatically reduce misinterpretation. I have seen teams skip both because they assumed the icons were "obvious." They were not. The bug reports came in the second week.
There is no universal reference you can rely on. Material Design guidelines, Apple Human Interface, FontAwesome docs — they all have different conventions for the same concepts. Cross-reference if you are mixing sources. Do not assume one library maps cleanly to another. They do not. The work of figuring out o que elas representam is fundamentally about communication, not design. The icon is just the medium. Once you treat it that way, the decisions become simpler and the debates stop being about taste.