This is the 10319th most frequent Russian word.
броское
Flashy, eye-catching.
Here, 'броское' means 'flashy' or 'striking', describing the dress as attractive to the eye and noticeable.
Это платье очень броское и сразу привлекает внимание.
This dress is very flashy and immediately catches attention.
In this case, 'броское' illustrates his behavior as eye-catching, referring to something noticeable or distinct.
У него броское поведение, которое всегда привлекает внимание.
He has a flashy behavior that always draws attention.
Here, 'броско' (adverbial form) indicates that the watches' appearance is conspicuously attractive or noticeable.