Description of the checks

Why do some controls raise warnings and others cause problems?

Here is a list of all files containing all default checks, with a detailed description and the cause of their designation as a problem or warning:

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check_description.py

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check_h1.py

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check_h2.py

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check_images.py

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check_keywords.py

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check_keyword_url.py

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check_links.py

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check_title.py

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check_url.py

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content_words_number.py

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keyword_present_first_paragraph.py