If you will look it up on the web you shall find the following , and I quote:
"O'Connell Bridge is a road bridge spanning the River Liffey in Dublin, and joining O'Connell Street to D'Olier Street, Westmoreland Street and the south quays."
Nonetheless it is one of Dublin's landmarks , not just a bridge as one could be thinking of in a simple way.
Originally built in the late 1700 ... rebuilt an refurbished ever since whenever needed and its name got changed in 1882 once the statue of Daniel O'Connell got unveiled at one end of the bridge.
Nowadays is a genuine landmark of the city ... not necessarily a must see, however if you are in the area it is definitely worth a few minutes and a few pics.