Refers to how well a product is selling; often used in business contexts to describe market performance.
Sales of the new product are going well.
この本の売れ行きが伸びている。
Demand for this book is growing.
The new product is selling well.
Sales of this book are growing.
The store manager checks the sales figures every week.
Sales have been sluggish this year.
Search-only abbreviated form; not standard.