Traditionally, bail is some form of
property deposited or pledged to a
court in order to persuade it to release a suspect from
jail, on the understanding that the suspect will return for
trial or forfeit the bail (and be guilty of the
crime of
failure to appear). In most cases bail money will be returned at the end of the trial, if all court appearances are made, no matter whether the person is found guilty or not guilty of the crime accused. In some countries, including the US, granting bail is common. Even in such countries, however, bail may not be offered by some courts under some circumstances; for instance, if the accused is considered likely not to appear for trial regardless of bail. Countries without bail imprison the suspect before the trial only if deemed necessary.
See more at Wikipedia.org...
The list that sets the amount of bail a defendant is required to pay based on what the charge is. A judge may be able to reduce the amount.