Declension in German grammar is crucial for understanding the function of nouns, as it shows the gender, case, and number of a noun. The way a noun changes form depending on its role in the sentence is referred to as declension. The noun might be influenced by its gender, whether it is singular or plural, and its case: nominative, accusative, dative or genitive. Even though it might sound complex, with practice, one becomes familiar with the various possibilities and their uses.