Explain the concept of a confidence interval (CI) in the knowledge of Statistics.

I'm preparing for an exam, can anyone please explain to me the statistical concept of a confidence interval (CI).
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"A confidence interval is an interval computed from the sample observations x1, x2….xn, with a statement of how confident we are that the interval does contain the population parameter. Confidence interval In statistics, a confidence interval (CI) is a kind of interval estimate of a population parameter and is used to indicate the reliability of an estimate. It is an observed interval (i.e. it is calculated from the observations), in principle different from sample to sample, that frequently includes the parameter of interest, if the experiment is repeated. How frequently the observed interval contains the parameter is determined by the confidence level or confidence coefficient Confidence intervals consist of a range of values (interval) that act as good estimates of the unknown population parameter. Source: http://in.docsity.com/en-docs/T_Distribution-Statistics-Solved_Quizes_"
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A range of values so defined that there is a specified probability that the value of a parameter lies within it
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