Thank you! This is helpful. I'm new to tracking this so I'm not quite sure where to gather all of this information. I found the "lost" links and the websites don't seem to be very high quality so I'm not too worried, however I'm having trouble finding the content they linked to. Any tips?

Thank you both! So at what point do you think it's important to investigate to find the cause? And when do you think it's normal fluctuations?

I am noticing a decline in the number of our linking domains and inbound links from month to month. It isn't drastic but looking like a trend. Any reason why this would happen? I'm not sure where to start. Thanks!