Link Aggregation (LACP) will allow you to increase the bandwidth TO and FROM your Synology NAS. In summary, this will allow more clients to send data to and from your NAS without decreased performance. To be clear, this will not double the network speed for a single client. Link Aggregation simply opens more “channels” to and from your NAS. For example, if you have two PCs connecting to your NAS, each client will receive a maximum of 1Gbit of local network speeds as opposed to 500Mbit. There is also the added benefit of redundancy, as a single failure will automatically allow the device to fai