content: It can speed up downloads from sites that only allow a certain bandwidth from each connection. Lets say youtube only allows 200Kbs from each conenction. If you downloaded that nronamlly youd get 200Kps but if you use for example Downthemall it will connect 20 times for 4Mbs or 200Kps times 20. Maybe not an issue from downloads in the same country but for overseas sites it shows its value. They also let you resume downloads more easily if they break where a browser you likely have to start again.