Ответ:

1. A social network is an Internet platform where you can post information about yourself and share information, photos, messages, and various files with other users.

 The ability to communicate with friends at a distance.

 search for lost contacts and new acquaintances.

 Social networks can be used as a tool for self-development, learning foreign languages, reading interesting books, listening to music.

2.modern technologies can help during the learning process. With their help, you can exchange lecture notes, lab assignments and other useful information. There is also an opportunity to join a community of a certain topic. To do this, there are links to the necessary photo and video materials, you can discuss problematic issues with other members of the group.

In social networks, you can communicate not only with friends, but also with fans. Answer questions, invite to an event, etc.