Take a walk around the outside of your home and look for foundation cracks, bulges, spalling or other signs of damage to the concrete or block work walls. The ground should be sloped away from the foundation as this helps to prevent water damage such as spalling of masonry, wood rot and damage to interior finishes. Use a screwdriver to poke at exposed wood, door and window sills and frames. Now make the same inspection on the inside. If you find cracks in concrete or masonry, you can normally ignore them if they are hairline and don't show other signs of problems.
Typical problems are white salty deposits around cracks.
This indicates that moisture is seeping through, and leaching the salts out of the concrete. If this occurs in conjunction with a seasonally damp floor, you may need to excavate around the house and repair or install weeping tile to control ground water before you finish the interior walls or floor for your basement family room or whatever. If this plaster develops cracks within a week or so, you have an active crack, which means the building is moving. This calls for professional advice. Stable cracks can be sealed with compatible mortar or suitable proprietary caulking.