They are making two assumptions.
First, that you are doing the test because you feel you have a slower speed than you are used to.
Second, that you are on ADSL2+.
The reboot is to ensure that you haven't got a low sync for some reason, a random burst of noise such as a thunderstorm for example.
The second logically follows because nowadays a reboot/re-sync on WBC ADSL2+ causes an immediate rise in IP Profile. So they are trying to ensure any temporary problem is eliminated, so as to narrow things down to more serious problems.
This falls down for a number of ISPs. Including at least AAISP, all resold Entanet products, and Plusnet, where they hold a copy of the BT Wholesale IP Profile which does not react immediately. Possibly taking several hours or even failing to update.
So if you know your sync is OK, ignore it.
Step 8, as ever, is tripe. But is rigidly adhered to by all ISPs as no-one in BT Wholesale seems to understand their own system. As a result ISPs' staff have no avenue open to challenge it. To the point that BTW and BT Retail training clearly teaches newcomers the same garbage. The teachers don't know it is rubbish.
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost
. Internet connection -
Plusnet Value Fibre.
"Where talent is a dwarf, self-esteem is a giant."
- Jean-Antoine Petit-Senn.