Boiling – when enough wort is filtered, boil it and during boiling follow the recipe for hop adding. When you boil wort with hop you get flavor, aroma from it. Important factors of boiling are also sterilization of wort, concentrating of wort, end of enzyme activity, coagulating proteins and oxygen removal.
Usually the boiling takes about 60 minutes or few minutes more, but remember when you use pilsen malt you need to boil at least 90 minutes (for DMS removal) – bad taste, smell of your beer.
Video of boiling: