The marubozu candlestick pattern is one of the single candlestick patterns (i.e. it consists of only one candlestick), and it is a bullish pattern.
The long marubozu candlestick opens at (or near) its low, and closes at (or near) its high, showing that the time frame consisted of generally bullish trading.
When there are more buyers than sellers, it is likely that a bullish candle without wicks may form, this is called a Marubozu.