Yes, you should follow your web host’s blog. Your web host’s blog may contain useful information and the latest updates on any issues they may be experiencing. Some web hosts post useful tricks and tips for improving your web hosting experience.
Other web hosts may post system maintenance information, outage notices, and critical update information to their blog. It is a good idea to add your web host’s blog to your list of favorite sites to keep track of. Depending on how often your web host updates their blog. Information on that blog may answer your question on why your server was running slow or why there was a lot of packet loss today.