The mechanism is worth understanding because it explains why strength is not the issue. A service you signed up for years ago is breached, and the credentials appear in a collection that gets circulated and automated against. Software then tries that email and password combination against banks, email providers, hosting accounts, and payment platforms. If you used the same password anywhere that matters, the attacker is now inside without ever attacking you. A long, complex password reused in four places is worse protection than four mediocre ones used once each.
A password manager fixes this by making unique credentials effortless rather than disciplined. It generates a different password for every account, stores them encrypted, fills them automatically, and means you only remember one. It also gives you a shared vault, which replaces the practice of sending credentials by text or email, where they persist indefinitely in places nobody controls.
Two features matter beyond storage. It will tell you which of your existing passwords are reused or have appeared in known breaches, which is usually a sobering first report and a clear list of what to fix. And most offer emergency access, letting somebody you designate request your vault after a waiting period, which solves a continuity problem most solo operators have not considered: whether anybody could reach the bank, the domain, or the email if you were unavailable for three weeks.
Set it up by adding accounts as you use them rather than importing everything at once. Do the critical ones first: email, banking, domain registrar, hosting, payment processing. Your email is the most important credential you own, because it is the reset mechanism for everything else.
Choose one that supports emergency access and configure it, because that feature solves a problem most solo operators have never considered. If you were unavailable for several weeks, whether anybody could reach your bank, your domain registrar, or your email determines whether the business continues or stops. Designating somebody who can request access after a waiting period takes minutes and is the least interesting item on any security list that most deserves attention.
Start with the critical accounts rather than importing everything, because a migration that stalls halfway leaves you worse off than before. Email first, since it is the reset mechanism for everything else, then banking, then your domain and hosting, then payment processing. Add the rest as you encounter them in normal use, which spreads the effort and means the important ones are protected within an hour rather than after a project.