Advertising by lawyers

What does Advertising by lawyers mean in American Law?

The definition of Advertising by lawyers in the law of the United States, as defined by the lexicographer Arthur Leff in his legal dictionary is:

Until the late 1970’s, any advertising of their services by lawyers, except for the most pallied kinds (e.g., entries in authorized law listings; a chaste sign on one’s door) was considered unethical. The Supreme Court then ruled that it was unconstitutional totally to ban such advertising; at least availability and price information must be permitted. Lawyers have since begun to advertise even on television. But there has as yet been no wild scramble in that direction, perhaps because a large part of the bar still perceives the process as either unseemly, personally uneconomic, or both.