Existing Wording: They are useful whenever there's a desire to guide how a consumer of information will navigate it and thre's a need to have a "frozen" view of information that can be reliably retrieved even years in the future.

Proposed Wording: They are useful whenever there's a desire to guide how a consumer of information will navigate it and there's a need to have a "frozen" view of information that can be reliably retrieved even years in the future.

Comment:

there's is misspelled