Write a new description and fixed some typos

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[ x] My entry follows the Codecademy Docs style guide.
[ x] My changes generate no new warnings.
[ x] I have performed a self-review of my own writing and code.
[ x] I have checked my entry and corrected any misspellings.
[ x] I have made corresponding changes to the documentation if needed.
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[ x] I have linked any issues that are relevant to this PR in the Issues Solved section.

Codecademy / docs