Icons is another important visual element which helps to guide users, decorate the content, divide information
or simply replace words making content more memorable.
There are a few things I keep in mind when creating a set of icons: simplicity - the less elements - the better. Complicated icons are less recognisable. Consistency of the design - all sizes, elements, details, colors, lineweights must be the same. Familiarity - creativity is always welcome, but when designing icons, it's better to choose well known signs rather than something unusual, then the icon might be confusing and we don't want that.