incompatible meshes and multi-point restraints

Hi,

I understand that "multi-point restraints" are used internally when the mesh is incompatible (see excerpt below from SW help- "Guidelines on Studies with Contact Conditions"). Can someone explain in some detail what is being done since I'm running a study on an assembly which results in incompatible meshes and would like to understand what errors could be introduce by incorporating this type of restraint.

Thanks

"Bonding is achieved by merging nodes when the mesh is compatible or by using multi-point restraints internally when the mesh is not compatible. Bonding incompatible meshes can generate local stress concentrations in the bonded areas."

SolidworksSimulation