it gives you information
You'll have to be a person of importance. Wikipedia asks that you do not create articles about yourself. Wikipedia has policies for those who can have an article - it's called "notability".
It has been found that DataStage is a product put out by IBM. The importance is technology related, and is known to construct data integrations. More detailed information can be found on the Wikipedia website.
The mathematical importance of an imaginary number is to allow the result of a square root of the imaginary number to equal a negative number. One can find more extensive information on imaginary numbers and their importance on the Wikipedia website.
You might be thinking of the 'Fourth Estate'. For more about this please consider viewing the wikipedia article.
Scroll down to related links and look at "Density of air - Wikipedia". See: "Importance of temperature".
Scroll down to related links and look at "Density of air - Wikipedia". See there: Importance of temperature.
Information on the historical importance of chariot racing can be found in the history section of your local library. You can also find this information on the internet and on sites such as Vroma, Wikipedia, and Schoolnet's Spartacus section.
Assuming the question is referring to the Normandy beach, codenamed "Juno" during World War II, the answer may be found at the Wikipedia link, below.
Look in wikipedia for the makeup of water and how vital it is to our lives. Nobody can live without water on a frequent basis. The body is mostly made of water.
Midsummer is June 24th, the second English "Quarter Day" of the year. Rents were due on the Quarter Days, so it was of some importance. The others can easily be found in Wikipedia.
It forebodes by two weeks the end of the [Gregorian calendar] year. There are many births, deaths, historical events, holidays and observances listed at the Wikipedia link, below:
Wikipedia has an excellent introduction. But, after you've learned the basics, you'll want to move on to Fidelity.com and Yahoo Finance. Fidelity will let you use most of their calculators without having an account on them. And, Yahoo finance will give you more advanced information than Wikipedia and a broader range of opinions.