well Ansuya gave her own jewelry from a box to Sita; gold and silver ornaments. Although, Sita knew it would be wrong to accept something so beautiful, she also realized it would be wrong if she didn't accept a gift given from the heart.
Ansuya asked sita to wear these ornaments. So Sita put on her new jewelry and as always she looked dazzling. Rama fell more in love with Sita after seeing how classy she looked in the new jewelry.
The jewelry was more than just a mere gift, it would become the key to finding Sita. When Ravana kidnapped her, she knew that the only way to leave a clue is to drop the jewelry. While Ravana carried Sita across the river, Sita saw two monkeys standing on a hill, one gold monkey and one white one.