What are "Dropouts"?

They seem to be showing more and more after timer recording.
Since Timer recording is all I do, I don’t know if they happen other times.
Do I need to be concerned about these?
I ignore them and do not see any consequences.

It’s bits of missing audio where the recording was interrupted…

Your operating system is always multitasking even when you’re running only one application. For that reason the digital audio stream flows smoothly into a buffer (like a long pipe or storage tank). When the operating system gets around to it, the buffer is read and the data is written to the hard drive in a quick burst. If the buffer doesn’t get read in time you get buffer overflow and a glitch (dropout). There is also a playback/monitoring buffer that works the opposite way… It gets filled in a quick burst and then the audio flows-out smoothly. In this case the danger is buffer underflow.

[u]Here[/u] is some information and some suggestions for avoiding dropouts.