Magento is worldwide popular ecommerce framework used by large portion of online businesses. Many hackers in the world try to steal information like credit card detail, customer data etc. this is always must to ensure as security should be proper on Magento.
In terms to Keep Magento secure and up to date, Magento release its security patches time to time which ensure a secure and safe environment for business owners again a threats. This is good practice to apply Patches on Magento store as soon as Magento release it. This is must to check all old security patches every time before installation of new security patch, because mostly patches depends on other patches.