When does an imperfect competition occur in economics?

Imperfect competition occurs in economics when the conditions for perfect competition are not met, leading to market structures where individual firms have some control over pricing. This can happen in markets with few sellers (oligopoly), many sellers with differentiated products (monopolistic competition), or even in markets with significant barriers to entry. In such scenariOS, firms can influence market prices, resulting in inefficiencies and a lack of optimal resource allocation. Examples include industries like automobiles, fashion, and technology, where product differentiation and brand loyalty play significant roles.