In telescopes up to 6 inch diameter it appears as an increasing large and fuzzy blob. Starting with an 8 inch diameter telescope more and more stars appear superimposed on the haze of the rest of the star cluster. It makes quite a nice 3-D illusion because the bright stars appear in front of the ball of haze. The larger the telescope the more stars appear. We call these clusters globular because there is another type of cluster.
Globular clusters are, lets face it, big globs of stars.
There are tens of thousands, up to a million stars in these clusters. Galactic, because they appear mostly near the hazy band of the Milky Way galaxy. Actually both types are members of the Milky Way. The open clusters lie along the galactic disk, while globulars are arrayed in a spherical cloud centered in the galaxy's nucleus. Two kinds of star clusters, and two kinds of distributions.