Ask peers or connections for feedback when, or before, you update your profile.
Once you've written something new on your profile, try asking someone who does not really know your "persona" to assess it. Perhaps a family member — or ask a trusted connection on Polywork to help by sharing the URL with them.
The objective feedback they give will help you to improve your update. They may realise you've missed out on attaching a useful activity tag. There may be a typo or grammar error. They can also pick up on areas where you have not explained things clearly.
Other people, if asked to give an honest assessment, will quickly spot gaps and pick up on unclear, clichéd or redundant phrases. They will spot when you are clearly faking it, using jargon, or simply talking crap.
Follow me, David Petherick on Polywork @petherick or just ping me a message there, or get in touch via Twitter @petherick.
I'll give you a free 10-minute assessment of your profile's strengths and weaknesses, and then send them to you, along with some advice and solutions from my 15 years of experience writing profiles. Just book a free phone call, Skype or Zoom to suit your diary.