Problem
You make a change to the portal, such as adding an Entity List, adding a Search bar or adding some custom Javascript and then expect to see it take effect on the portal. But, alas the portal doesn't reflect the changes that you were expecting.
You do a CTRL + F5, but to no avail
Unfortunately, in its current form, dynamics portal doesn't have a publish button for changes to take effect
Thankfully, there are a couple of solutions available. Phew!
Solutions
Clear Cache (logged in as an Admin)
go to append _service/about at the end of the portal URL e.g. https://help.powerappsportals.com/_services/about
Clear Cache button
Note: if you're not logged in as admin you just get a blank page with the portal version number
Restart the portal
log into the Admin Centre → click on the three dots next to the Portal Instance (…) → then Click on Administration
In Administration, Click on Portal Actions then click on Restart
Note: it can take up to 5 minutes to Restart the Portal
After you've done either of the above actions do a CTRL + F5 on the portal and hopefully, it should bring up the changes that you'd been expecting