The most commonly used ones include, for example

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Product – an entity that describes individual products or services. It can also be assigned properties such as price, stock availability, image, target group, brand or organization, as well as reviews, etc.
Organization – an entity describing a specific organization, company, manufacturer, institution, agency, office, etc. It can be defined through properties such as address, contact, date of luxembourg phone number data establishment, logo, etc. Specific products can also be assigned to it.
Person – an entity defining a person, including their address, contact, date of birth, nationality, etc. through properties. It can be linked, for example, to a specific organization or event.
Event – ​​an entity for designating a specific event. It can be a business event, a trade fair, a course, a training course, an artistic performance, a festival, a sporting event, a social event, etc. Of course, it can be associated with a date, a place of occurrence, as well as specific people, a company, etc.
Structured snippets (rich snippets)
In practice, Google in particular places a lot of emphasis on structured data because it allows robots to better assess a given website. Although Google has not directly confirmed the impact on SEO rankings and SERP positions, it is certain that structured data can significantly affect CTR. As structured snippets, structured data can be displayed directly in search results (see example above).

This allows you to get more space in the SERP than usual. Thanks to structured data, a specific website will have more information than others. This attracts attention and increases CTR. According to research, the click-through rate (CTR) of a specific website can increase by up to 30% thanks to structured snippets.