It shows the status of Sprwt's automated login-abuse defense for this account. Green "Login active" is normal. It turns red and reads "Unlock login" after this account is blocked at login from a datacenter/proxy network (part of the bot-signup/bot-login defense) — click it to whitelist the account and clear the block. A green "Login active (unlocked)" badge means you've already whitelisted them and bot-login checks are skipped for this user; click it again to re-enable the checks.