Why can the Renaissance can be considered a "golden age". Any ideas would be appreciated.

I would say that the Renaissance can be considered a golden age
because it was a time when Europe experienced a boom in arts, science and culture.  Because of
this, it was a time when things were better in Europe than they had been before (at least in
terms of these things).

During the Renaissance, many new
technologies emerged that changed people's lives.  One major example is the printing press.  This
allowed more people to be exposed to more ideas than was previously
possible.

At the same time, there were all sorts of great artists
creating masterpieces of art.  By creating these great works, the artists contributed to a time
that was richer in culture than any time before (and perhaps any time
since).

So this was a golden age because it was a time of major
advances in various areas of culture.  It was a time that was more advanced than times before and
that makes it a golden age.