Many platforms now allow you to enable Multi-factor authentication to keep your account more secure. Multi-factor authentication (MFA) adds that necessary second check too verify your identity when logging in to one of your accounts. It's another layer of protection that helps verify that it's actually you who is accessing your account. 

Visit https://www.cisa.gov/mfa for more info.

Insight from Industry

Google: Protect your account with 2-Step Verification - Computer - Google Account Help

Apple: Two-factor authentication for Apple ID

Microsoft: How to use two-step verification with your Microsoft account

Yahoo: Add two-step verification for extra security | Yahoo Help - SLN5013

AOL: Add two-step verification for extra security - AOL Help