When you link tasks (task: An activity that has a beginning and an end. Project plans are made up of tasks.) in Project the default link type (link type: The type of task dependency. The four dependency types are Finish-to-start [FS], Finish-to-finish [FF], Start-to-start [SS], and Start-to-finish [SF].) is finish-to-start, but you can also link tasks at their start dates or their finish dates.
||Task (B) cannot start until task (A) starts. For example, if you have two tasks, "Pour foundation" and "Level concrete," "Level concrete" can't begin until "Pour foundation" begins.
||Task (B) cannot finish until task (A) finishes. For example, if you have two tasks, "Add wiring" and "Inspect electrical," "Inspect electrical" can't finish until "Add wiring" finishes.