*Sigh*
Yes. Minus certain terms like "pitch" which may seem commonplace to blokes like you, not to us newbies, and that's going from one of the simplest things.
I guess the most frustrating part here, is I've asked what the POINT is of making a yeast starter, and everybody's gone "HERE'S THE RECIPE YOU IDIOT!!!". Effectively my question has gone unanswered in fabour of newbie bashing.
I also asked how to re-make yeast by re-using some of the beer from your brew keg.
Once again "HERE'S THE RECIPE YOU IDIOT!!!" (reference back to yeast starter, once again NOTHING even close to the question asked). Question goes unanswered, accusation of not enough research, newbie bashing.
If I'd have found the answer through my research, why do you think I would have asked?
Furthermore, what's the point of having a newbie question forum if people are just going to abuse you and tell you to look elsewhere?
You actually did not ask that, your original question and follow-ups are much more convoluted - which is why myself and others are so confused as to what you want.
What you are asking is answered in even the most basic brewing texts, either online, in real-book or ebook format, I seriously suggest you read one. Your question is one of those things that is so obvious to most anyone who knows even a little bit about fermenting would take it for granted that everyone knows the answer - kind-of-like driving your car on the correct side of the road, everyone takes that for granted (even if they do it differently in different parts of the world).
The "How to Brew" book (which I suggested earlier), is a great starting point for anyone looking to get into home-brewing and is avaible free on the internet:
http://www.howtobrew.com/
I don't think strongly suggesting you go read it is calling you an idiot, or suggesting anything bad - however it does contain much of the basic knowledge that you are asking for others to spoon-feed you - a little research and reading on your part would go a long way, and at least allow you to ask future questions in ways that other people understand your intent.
Now that you have asked your question more clearly, let me try and answer it for you:
When adding yeast (
pitching) to your malt-sugar solution (
wort) you need to add the 'correct' quantity of live (
viable) yeast cells, so they can do their job successfully (
ferment sugars into alcohol and create other byproducts). The 'correct' amount of yeast depends on the volume (
how much you have), gravity (
how much sugar you have, ie: how strong it is) and type of beer you are making (
eg: English Ale, American Ale, Lager, Wheat or Alt Beer) (
please read How to Brew).
However, manufacturers do supply home-brewers with a custom made packet of yeast in the 'correct' quantity for each individual beer they make.
So home brewers need to either buy and pitch more than one packet of yeast (
either dry or liquid form) and use those
OR they need to grow their own yeast so that they can get the 'correct' amount of yeast to make their beer.
Growing yeast is called "making a starter", you might also "make a starter" to improve the health (vitality) of the yeast, "making a starter" is most important when using liquid forms of yeast, which is an advanced topic that most new-brewers do not need to worry about for some time, because using dry yeast and/or buy the required number of packets of liquid yeast is easier and simpler.