When doing Network Analysis of Social Media Networks, a BRIDGE is a technical term for a person who LINKs two otherwise separate networks.
https://en.wikipedia.org/wiki/Bridge_(interpersonal)
Bridges are important in making something go viral. If you know who the bridges are, then simply by distributing info to them, it is virtually guaranteed to go viral over the whole network.
Another way to use bridges, is if you can attract them all to follow one person (like QAnon) or to join one discussion forum (like QResearch) then you can guarantee a steady flow of new information will reach a wide audience.
In the pre-technology era, major newspapers served as BRIDGES. Then the TV networks took on that role. Now on the Internet, the role of a BRIDGE is up for grabs. What will replace MSM?