Wall Posting

I received two notifications of people posting to my "wall".
Firstly, I don't really know what my "wall" is. I would assume it would be like Facebook, LinkedIn, etc. but don't know how to access it.
Secondly, both posters have 0 activity on the forum.
Any insight on all of this? Spammers?
2 Channel "Polk" Room:

Marantz PM8004 Integrated
Marantz SA8004 SACD Player
Music Hall mmf 7.3 TT with Ortofon Bronze
WiiM Mini
Schiit Bifrost with Multibit Upgrade
Polk 7B with RDO198s

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