When do I use Will or Would in the future

This will be discussed in the next meeting.

This would be discussed in the next meeting.

[Philly]

Hi
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Your first sentence sounds like a simple prediction of the future or a promise that a certain topic will be discussed at the next meeting (and the next meeting is also expected).
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Your second sentence sounds a bit unfinished.
For example, it might be reported speech:
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He told me that this would be discussed at the next meeting.
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It might also be part of a second conditional. In other words, it might be used in a situation that is still seen as relatively unlikely:
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This would be discussed at the next meeting if the project were to be approved.