What does "Mercury in Leo" mean in astrology?

In astrology, Mercury in Leo is one of the 12 alignments of the planet Mercury. Those born during this time tend to be confident and often become figures of authority.

Those born under Mercury and Leo are more adept at seeing the bigger picture and are generally skilled in the art of persuasion. When Mercury-in-Leo people speak, they may come across as arrogant. Despite this, they are capable of promoting their ideas and messages. Mercury-in-Leo people tend to take pride in their beliefs, and creativity is often a very important aspect of their lives. Examples of people born under Mercury and Leo include Ben Affleck, Charlie Sheen, Bono and Robin Williams.