まいる (mairu) means “go” | MotiTan Japanese Dictionary

More examples

担当者が午後にまいります。tan tō sha ga go go ni ma i ri ma su

The person in charge will come in the afternoon.

Presents the speaker's movement toward a destination or person as humble conduct in relation to someone respected.

行くiku: To move to a place or person without expressing humility.
伺うukagau: To visit a person or place respectfully, with a humble tone.

自分の移動を、相手や話題の人物に対してへりくだって表す語。ji bun no i dō o ai te ya wa dai no jin butsu ni tai shi te he ri ku da tte arawa su go

まいる (mairu) is the modern form of classical まゐる (mawiru), which meant "to go or come humbly"; the verb is conventionally written 参る (mairu).

A service worker may say まいります (mairimasu) when coming to a customer, making the verb common in polite responses to a call or request.