I am learning about data dependent acquisition (DDA) mode in mass spectrometry from this online resource. I have come across the following statement:
In DDA mode, the mass spectrometer selects the most intense peptide ions in a first stage of tandem mass spectrometry, and then they are fragmented and analyzed in a second stage of tandem mass spectrometry.
I am not sure what is meant by the "most intense peptide ions". Does most intense refer to the most abundant peptide ions? Any insights are appreciated.