Second Brain / Standard term
Backlink
A backlink is a connection from one record to another that the linked record can see in return, so related notes, decisions, tasks, people, and projects reference each other and you can move between them in either direction.
A backlink is a connection from one record to another that the linked record can see in return, so related notes, decisions, tasks, people, and projects reference each other and you can move between them in either direction. A plain link points one way: a meeting note mentions a project, and you can open the project from the note. A backlink adds the return path, so the project record also shows the meeting note that referenced it. Say you write a meeting note that links to a person named Renee and to a decision about a launch date. Open Renee's record later and the system lists that meeting note under her connections; open the decision and the same note appears there too. Each link you make becomes findable from both records instead of only the one where you typed it.
Builder example
If your assistant files a meeting note that only links outward, the records it points to stay unaware they were referenced, so asking 'what touched this decision?' returns nothing. Tell the agent to record links both ways when it files a record, so opening a person or a project surfaces every note, task, and decision that pointed to it. That return path is what lets the assistant answer questions about a record by reading what connects to it rather than rereading every note you ever wrote.
Common confusion: A backlink and a one-way link both connect two records, and the difference is which records can see the connection. A one-way link is visible only from the record where you typed it; a backlink is visible from both ends, so the referenced record lists what pointed to it.