gulp-default is the default gulp task or entry-point that runs when gulp is initiated without a task name specified.
The gulp-default task is the default task in gulp which is usually considered the gulpfile's entry-point.
The gulp-default task is simply written with a name default followed by a list of other tasks that will run when gulp is initiated without a task name specified.
Example:
Gulp v3:
gulp.task('default', ['styles', 'scripts', 'images', 'watch']);
Gulp v4:
gulp.task('default', gulp.parallel('styles', 'scripts', 'images', 'watch'));
