§ “Would” is hypothetical and indicative of possibility/probability.
§ “Would” was historically the past tense form of 'will'. So the effect of using a past form is to distance oneself from realty or subject oneself to a remote possibility.
§ “Would” is used for polite expressions.
§ “Would” is usually used with 'if'.
'Will' is generally used when you want to indicate that something is certain.
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