The woman said to the serpent, “We may eat fruit from the trees in the garden, but God did say, ‘You must not eat fruit from the tree that is in the middle of the garden, and you must not touch it, or you will die.’ ”
Genesis 3:2‭-‬3

1. Don't reveal everything with others. If Eve was silent, Satan might not even know what command that the God gave to Adam and Eve.
2. Start of lie - God did not say to don't touch but she added points.

Even today many people have the habit of magnifying and exaggerating the things but it has its adverse effects.