Purple Stones, an interior decorator, has an online store to enable quicker purchase of its products. The website allows users to post reviews of products. This helps other customers evaluate the quality of a product before buying it$.$ Which of the following is illustrated in this scenario?

Question $4$ options:

$1)$

Competitive advantage

$2)$

User$-$generated content

$3)$

Artificial intelligence

$4)$

Economies of scale