This concept is somehow loosely tied to the Mandela effect.

I have memories. They are scattered and they only consist of a small cross section of my life. You have memories too – well, everybody does.
And we share some memories. They are tied to novel events. That’s easy to figure out. You have a memory of an interaction or an experience. The same thing goes for other people. They have memories and there can be a kind of overlap because of an interaction between people or an overlap because various people have experienced the same thing.
That all is pretty easy to understand. But I think there might be more to the memory thing. Something no so easy to understand.
Picture in your mind a woven fabric. This fabric is composed of threads that intersect. Grab one side of that fabric and give it a quick shake as if you were shaking dirt off of it. This causes a whip like ripple that travels across the fabric.

The carpet is the reality we are all experiencing. And the waving ripple is time. And…. are there peaks and valleys? And at these intersecting points of threads where the ripple his is a node of memory.
And are we all synchronized to have and remember those particular memories?
The ripple travels, it hits an intersection and creates something in space/time that causes us to create a memory — regardless of what the circumstances happening. So, we all, at regular intervals, and all synchronized create and file away a memory.
Did the picture above; the one that looks like Mel Gibson inspire the recollection of a memory node in you? Like it did for me?