Avoid using icons alone to symbolize an action
Icons alone are rarely broadly recognized and should often be accompanied by a text label. Symbols alone are also not always accessible for low vision users, who can have a hard time distinguishing what an icon is "supposed to" represent. And, icons represent different things in different cultural contexts.
Example: A gear icon could have different meanings to different people. For low-vision users or those using a screen reader, the text clarifies the symbol’s meaning.
If iconography or images are used, consider whether they should be described to assistive technologies, like screen readers. If an icon is accompanied by a text label, exposing the text label alone (and hiding the icon from assistive technologies) is usually sufficient. If the icon conveys additional, important information, add descriptions as appropriate. You might do this, for example, with alt text.