A hug is a simple and straightforward way to show that you care. It is a way of showing intimacy within a short period of time and making your partner feel loved.
The power of the hug lies in bodily contact. It is not as intimate as a kiss but still shows you love or care for your partner. If you see them first thing in the morning in the kitchen as they make breakfast, hug them from behind.
When you get home from work, make an effort to hug your partner as well. The type of hug you give communicates a lot as well.
A loving hug for your partner should linger long enough to pass the message. Side hugs are more effective with siblings and other relatives.
When it comes to your partner, you want to hug them without having any divided attention, no matter how brief it is.