Keep the jewellery stored in a jewellery box or in its packaging when not worn to avoid blemishes. 
Make sure to protect your jewellery against scratches, sharp objects and chemicals. Wash your hands before putting on or taking off plated jewelry. Put on gold plated jewellery after you’ve applied your perfume. Gold plated jewellery must only be put on after the cream or lotion you have applied has been absorbed by your skin
Remove jewellery whilst doing housework, at the beach, at the gym, in the sauna & pool etc. It is a bad idea to store jewellery in bathroom as the moisture will speed up oxidation.
Over time silver will tarnish. You can gently clean your silver jewellery with a silver cloth. 
Gold-plated pieces from IDAMARI are crafted from 925 silver and have layered with a thick layer of 18 carat gold. Gold plating will wear off over time due to due contact with chemicals, perfume and contact with hard objects and can be re-plated. You should take extra good care of your gold plated pieces and avoid scratches.
Gold plated jewellery can be cleaned with a special gold cleaning cloth.