Difference in Marketing and Sales

Both marketing and sales are closely related with each other. But there are some differences, which are very important.

The most important differences between the two is that marketing shows how to reach (new) customers and sales not.

For small companies, there is no marketing. There is only sales.
If a small company wants to grow, they invest in marketing.

Advertising is not marketing. It's sales. But getting statistics about potential customers is part of marketing. Knowing what potential customers need is also part of marketing.

The marketing helps you with specific, factual information to build a marketing strategy, which leads to increase of sales in short, medium and long term.

If you are interested only in your current customers, then marketing is overkill for you.
If you worry about your business, then marketing is very much needed.
If you are interested in allowing your company to grow, marketing is essential.