Complex sentence: Taylor had a walkway specially built from the venue's stage to reduce the gap between the audience and Bono, allowing him to perform close to the audience, and he was surrounded by fans on three sides.
Split into simpler sentences: Taylor had a walkway specially built off the venue's stage to "break down the gap between (Bono) and the audience". This stage allowed Bono to perform closer to the audience, surrounded by fans on three sides.