To look forward to something is to be happily excited about it coming. Look forward to the holiday, look forward to seeing you, something to look forward to.
What follows it is a noun or an -ing form, never a plain verb, which is the mistake learners make most often. In letters it is the standard polite closing.
1phraselook forward toTo be happily excited about something coming.
“I look forward to hearing from you.”
look forward to is a phrase.
Practised in Phrasal Verbs