Preinstalled WordPress plugins
Contact Form 7
https://cs.wordpress.org/plugins/contact-form-7/
Plugin for creating contact forms should be a part of each website. Whether you need contact, ordering or any other form, this plugin lets you easily create it. Contact Form 7 is very flexible – it lets you adjust and set up each part of the form. Simple or complex, every form can be created completely up to your preference. This plugin has great spam protection avoiding robots filling in your forms.
Cookie Notice GDPR
https://wordpress.org/plugins/gdpr-cookie-compliance/
Based on GDPR it is a legal obligation to inform the website visitors that the website is collecting cookies. Cookies are files that track history of your visitors’ behavior. They track information filled into forms or login. This plugin informs your visitors about collecting cookies by showing a message on top of the website. The visitor is then able to agree or disagree to cookie collecting.
Disable Comments
https://wordpress.org/plugins/disable-comments/
WordPress has a built in comment feature. Comments though are not needed for every type of website and this built in feature is not flexible at all. Disabling the comments is possible by manually turning it off in template settings or much more simple by using the Disable Comments plugin. Based on your preference it automatically disables comments on your website.
Google XML Sitemaps
https://wordpress.org/plugins/google-sitemap-generator/
This plugin automatically generates .XML sitemaps. This information about your website, individual pages and their hierarchy is important mainly for Google search optimization. Sending a sitemap to individual search engines lets them know about your website. It also allows you to let the search engines know about new content on your website.