Is it necessary to put to before verb?

It's not required.

samerrustomwe’re committed to helping you TO discover the music and comedy you love

The verb "help" can be followed by the to-infinitive or the bare infinitive:

Help mother (to) wash the clothes, please.

It is natural either way.

Thank you. This is the first time I hear "to-infinitive or the bare infinitive" can you explain each one of them please.

Does your example mean TO is optional after the verb help?

The infinitive is the base form of a verb. In English it is usually expressed (for most verbs) as to ___ , for example to discover, to hear, to explain. This is the to-infinitive. The bare infinitive is the same thing without the to, for example discover, hear, explain