This is the 28th most frequent Latvian word.
tad
"Then" or "at that time."
In this instance, "tad" introduces a consequence in a conditional sentence.
Ja palīdzēsi man tagad, tad es palīdzēšu tev vēlāk.
If you help me now, then I will help you later.
In this sentence, "tad" functions as an indicator of a result or action following a condition or event.
Kad esi pabeidzis, tad vari doties mājās.
When you are done, then you can go home.
Here, "tad" indicates a sequence of events, specifically the occurrence of an event following another.