What does #zerobasefee mean?

Channels have two types of fees:

There is newly implemented technology called MPP (multi-path payments), which allows an LN transaction to be sent through multiple channels. Potentially dozens of channels. There is a whole thread Twitter thread here about the benefits. If we have a base fee on nodes, MPP is going to be too expensive, because you have to pay the base fee to every path individually. Also, discovery of optimal channels is harder.

The #ZeroBaseSee campaign encourages node operators charge using the fee rate and set their base fees to zero. Btw, #DropTheBase would be a great name too.

For more in-depth information, also check out this this page by lightning dev Rene Pickhardt and  the paper about his novel path finding algorithm. 
Looks like it could improve the success rate of large payments significantly.

Great idea. You can edit this after the channel is setup. I used ride the lightning app to do this.

You can set a default parameter in lnd.conf to make sure you don't have to deal with it later on: 

; The base fee in millisatoshi we will charge for forwarding payments on our channels.
bitcoin.basefee=0