Adding functionalities to WordPress through plugins is common, but it is crucial to be cautious as many security breaches originate from vulnerabilities in these plugins. Experts advise evaluating the necessity of a plugin before installation, as poorly coded plugins can lead to website hacking. It is recommended to research a plugin's safety by checking for known vulnerabilities and assessing the credibility of its developer. Regularly reviewing installed plugins for updates is essential since outdated ones are more susceptible to attacks. Popular plugins with large user bases are generally updated more frequently and may be safer. The principle of "less is more" applies to plugin usage, emphasizing minimalism to enhance security.