来访 (lái fǎng) means 'to come and visit' — it emphasizes the guest arriving at the speaker's location and is used in formal, often hospitality or official contexts. Unlike 访问 (fǎng wèn, general 'visit a person/place') or 看望 (kàn wàng, 'visit someone caringly'), 来访 focuses on the visitor's arrival. It is more neutral than 拜访 (bài fǎng, 'pay a respectful visit to a superior') and 探望 (tàn wàng, 'visit the ill/elderly').