I Understanding Strings: Basic Concepts Explained

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What are Strings?
I don't have the requirements (thorough knowledge of SRT, ART etc.) to get into this theory, but I would like to get an idea about this word.

For the simplest case of a one-dimensional string, it is compared to a string from a musical instrument. Now the question is, what this string should represent. Is it something like an oscillation or a standing wave? Then the question arises, what the oscillation or standing wave would actually mean. To which specific phenomenon of the real particles would there be a relation?
 
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planet-75 said:
the question is, what this string should represent

In string theory, strings are the fundamental objects from which everything else is made.

planet-75 said:
To which specific phenomenon of the real particles would there be a relation?

In string theory, strings ultimately account for all phenomena. What we currently think of as "particles" (or more precisely quantum fields and their excitations) are particular kinds of string vibrations.
 
@planet-75 :
Here's a very short introduction to Strings by Leonard Susskind (interviewed by Brian Cox):
 
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