Demonstrate expertise through the content itself, precise specifics, correct nuance, anticipated edge cases, and real examples, rather than asserting credentials. Expertise shows in the knowing, not the claiming. A reader recognizes someone who genuinely understands a subject by how accurately and completely they handle it, not by being told the writer is an expert. The pivot is to show through substance, so the page never has to praise itself because the command of the material does the work.
The reason listing credentials reads as bragging is that it asks the reader to take expertise on faith while the content stays generic. “We are leading experts in this field” followed by surface-level advice creates a gap the reader feels immediately, and the claim turns into a liability. The opposite of bragging is not modesty, it is specificity: a page that names the exact figure, draws the distinction a novice would miss, and warns about the case that trips people up proves its knowledge in passing, without a single self-referential sentence.
Concretely, expertise shows when you get the details right. You give the precise number rather than a vague “a lot,” you handle the nuance, when the rule holds and when it does not, instead of stating the rule flatly, you anticipate the edge case the reader is about to hit, and you ground a point in a real example rather than an abstraction. Each of those is a small demonstration that the writer has actually worked with the subject. Stack enough of them and the reader concludes you are an expert on their own, which is far more persuasive than being told.
So when you want a page to read as authoritative, resist the urge to assert it. Strip the “we are experts” lines and replace them with the specifics, nuances, edge cases, and examples that only real command of the topic produces. Let the precision carry the credibility, and the page will read as expert without ever bragging, because expertise that is shown never has to be announced.