It’s usually just called “Kumo”, not “[I]future[/I] Kumo”: it projects into the future by definition, according to the way it’s constructed.
Its purpose is to display areas which (according to [I]Ichimoku[/I] theory) have increased chances of producing future support and/or resistance, and/or congestion-zones. These can be good areas to [I]avoid[/I] entering trades because of their decreased reliability.
There are many different ways of using the various [I]Ichimoku [/I]indicators to trade, and many different theories of “what’s best”. There’s also a [I][U]lot[/U][/I] of misinformation about it on websites and in forums. Some of the most “authoritative-looking” sites are actually the most misguided.
The key concept is probably to appreciate that the original settings for [I]Ichimoku[/I] were based on and constructed around [U]stock[/U] trading from [U]daily[/U] charts when there were [B]6[/B] trading days per week, and unsurprisingly enough these are settings that have absolutely no relevance to forex trading at all, on any time-frame.
And welcome to the forum.