Is 14k gold good for everyday wear?

Yes. 14k gold is a durable alloy that holds up to daily wear better than 10k or plated pieces, though any diamond ring should be checked for loose stones over time.

What does 4.55 ctw mean?

It is the combined weight of all the diamonds in the ring, not the weight of one stone. The stones are spread across the heart, so each individual diamond is smaller than the total suggests.

It weighs 16.3 grams, which is substantial for a ring. Expect it to feel noticeably heavier than a thin band.

A jeweler can usually resize a 14k gold band, but a diamond-set heart ring may limit how many sizes it can move. Ask a jeweler to inspect the setting before resizing.

How should I clean it?

Use warm water, mild soap and a soft brush, then dry it fully. Avoid harsh chemicals and ultrasonic cleaners unless a jeweler confirms the settings are tight.