Does the noble Hadith "Journeys are not to be made except to three mosques" mean that traveling to visit relatives in other countries is impermissible, or that traveling to the mentioned mosques is better?

The aforementioned Hadith indicates the virtue of the Sacred Mosque (Masjid al-Haram), the Prophet's Mosque (Masjid an-Nabawi), and Al-Aqsa Mosque, and that undertaking a journey (شد الرحال) should only be to them and to any intended place. As for traveling to visit relatives and maintain kinship ties, it is permissible and not included in the prohibition.