Why do we need the option to "@" when you bind to a domain hosting?

Good time of day. Tell me, please, when you bind a domain to hosting is in two lines:
www [domain] [ip] and
@ [domain] [ip]
Please tell me what does "@"? Thank you.
July 9th 19 at 13:39
2 answers
July 9th 19 at 13:41
Solution
@ responsible for domain.ru
www is responsible for www.domain.ru
Day nobska questions will be considered open) - Garland36 commented on July 9th 19 at 13:44
actually the question is not so noob as you think, because it's actually novskoe the solution, as RFC just has no @ moreover configs not ponimayut on the line @ and in fact in the same бинде9 instead of a dog is the normal value. - Lavern_Schuppe commented on July 9th 19 at 13:47
July 9th 19 at 13:43
Solution
Thanks, this is exactly what you need - Garland36 commented on July 9th 19 at 13:46

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