What does the quote said by Willy, in "The Death of a Salesman", "be liked and you will never want" mean?

Willy Loman, in Arthur Miller's play "The Death of a
Salesman", states the following: "be liked and you will never
want."

Basically, what Willy is saying here, is no
different from how people are regarded today--62 years later. People who are liked get
more out of those who like them. Whether it is sales (like Loman) or friendship. It is
simply easier to do something, to help someone out, when you like
them.

Here, Loman is simply stating the facts in life.
During a conversation with his wife, Linda, Willy is simply stating that he cannot
understand how he cannot make the sales he so desperately
needs.

Later, in Act One, the quote in question
appears:

the
man who makes an appearance in the business world, the man who creates a personal
interest, is the man who gets ahead. Be liked and you will never want." Act 1, Part
3

Willy understands that the
man who makes himself known, the man who, in essence, "plays the part", is the man who
will be liked by all others. In the end, when one is liked by others, it is simply
easier to get what they need from them.