She is talking about a dump of UK and US forces into North Africa for 3 turns, with a fleet that is immune to the Germans, then when the extra units arrive she can shift anywhere she wants with complete immunity.
The SZ35 fleet can be moved into UK waters on UK4, allowing for a landing in Western that turn, or anywhere else the following turn, with plenty of naval force protection for the TRNs, allowing the UK and US combined fleet to split apart, with UK heading north, and US moving into the Med if they choose.
The net effect is that Russia stands alone against Germany for 3 turns while Germany loses Africa. With solid Russian trading, 4 turns is not a major problem. Then starting in Turn 4 Germany has a few issues… Allied fleets they cannot hope to touch, the Brits hammering them in Norway, Karelia, Eastern, or moving to Archangel to reinforce the Russians, and the US able to hammer Western, Southern, or move through the med to reinforce Caucuses.
It is actually a VERY deadly strat if it is not effectively countered as it allows the UK and USA to make a landing of more than 20 divisions in Turn 4, basked up by AF and BB shots, and enough extra TRN that survivors in addition to build units can strike again elsewhere with no interruption of any shucks.