What is advertising to companies? 

Companies spend money on advertising because it increases sales of existing products,helps grow adoption of new products, builds brand loyalty, and takes sales away from competitors.

To compete and grow in today’s diverse, ever-changing marketplace, businesses must reach their target customers efficiently, quickly alerting them to new product introductions, improved product designs, and competitive price points.

Advertising is by far the most efficient way to communicate such information.

adoption (n) 采用   

brand loyalty 品牌忠诚度   

diverse (adj) 多样的

marketplace (n)市场竞争  

alert (v)使意识到  

by far 显然