Here is a quick overview of how a user remembers a product. A product can be a random application, however, the points discussed below implies to all;
Identifying analogous and Discrimination: Products that are similar to the ones a user has used before and different from ones a user has used in the past.
Consistency: Consistency across the entire product ensures quick referencing. Easy navigation, interactive designs, flexibility, and the efficiency of use (Keyboard shortcuts) reinforce the idea of quick referencing. Furthermore, consistency is indispensable between style and UI elements.
A user never remembers the mismatched UI elements, some elements in UI that create confusion, or weak association and navigation throughout.