It is recommended that any jewellery should not be worn at night, not got wet e.g. not to be worn whilst swimming, showering or exercising and isn't cleaned with any chemicals.
For sterling silver jewellery, it is recommended that the jewellery is contained in an airtight container, such as a resealable plastic bag when not in use. If the sterling silver does tarnish, a silver polish cloth can be used to remove the tarnish and restore the shine.
If giving as a gift, please keep the jewellery item inside the plastic resealable bag it arrives in until you are ready to gift the item. The gift box isn't airtight and therefore keeping it in the plastic bag will keep the sterling silver from tarnishing.
For stainless steel jewellery, it is recommended that the jewellery is stored separately from other items when not in use, as whilst stainless steel is durable it can scratch. If the stainless steel needs to be cleaned, then a damp cloth with gentle wiping should normally suffice otherwise, some water with some gentle dishwashing soap can be used to dip the cloth in before gently wiping. Always wipe in the direction of any polish lines and make sure that any soap residue is removed and the item is thoroughly dried.