Are carousels effective on non-Ecommerce sites [duplicate]

1. Are carousels effective?
2. What is carousel in ecommerce?

Are carousels effective?

Carousels may seem flashy and cool but they're simply not effective when it comes to converting visitors to qualified leads. Not only do they lead to slow load times, but they also create a poor user experience that reflects badly on your brand.

What is carousel in ecommerce?

A carousel module is used to put multiple promotional items (including rich images) in a rotating carousel banner that customers can browse. For example, a retailer can use a carousel module on a home page to showcase multiple new products or promotions.