A lease is a contract you are expected to sign quickly, with the parts that cost you money concentrated in clauses that look like boilerplate. Here is where to look, and what each term actually commits you to.
A credit score compresses a complicated history into one number, using two competing formulas that disagree by design. Understanding what is actually in the number is the difference between improving it and chasing it.
A website that serves plain HTTP with no HSTS header looks alarming in a scanner. In practice the risk is specific and mostly about downgrade and injection — and it is cheap to fix, if you know which header to add first.
Not all missing pages behave the same way, and the difference between a real 404 and a "soft" one is invisible in the browser but very visible to a crawler. It is also the most common self-inflicted SEO problem on otherwise healthy sites.