In social situations, greetings are quite distinct. Among strangers, a firm handshake with direct eye contact and a smile is the standard. However, once a relationship develops, especially among friends, air - kissing on both cheeks, starting with the left, is added. Men may also give a pat on the back to each other. First impressions matter a great deal in Italy, so demonstrating propriety and respect during greetings is crucial, especially when meeting someone for the first time.
When it comes to invitations, if an invitation specifies "informal" dress, it still means wearing stylish yet relatively formal clothes. For men, this could be a jacket and tie, and for women, an elegant dress. Punctuality also has its own rules. If invited to dinner, it's acceptable to arrive 15 minutes late, and up to 30 minutes late for a party. But for business meetings, especially in the north of Italy, punctuality is highly valued, and being on time is a virtue that business associates are likely to uphold.