Star (classification) in the context of Hotel Vier Jahreszeiten (Munich)

Hotel ratings are often used to classify hotels according to their quality. From the initial purpose of informing travellers on basic facilities that can be expected, the objectives of hotel rating have expanded into a focus on the hotel experience as a whole. The terms "grading", "rating", and "classification" are used to generally refer to the same concept.

There is a wide variety of rating schemes used by different organizations around the world. Many have a system involving stars, with a greater number of stars indicating greater luxury. Forbes Travel Guide, formerly Mobil Travel Guide, launched its star rating system in 1958. The AAA and their affiliated bodies use diamonds instead of stars to express hotel and restaurant rating levels.

A like button, like option, or recommend button is a feature in communication software such as social networking services, Internet forums, news websites and blogs where the user can express that they like or support certain content. Internet services that feature like buttons usually display the number of users who liked the content, and may show a full or partial list of them. This is a quantitative alternative to other methods of expressing reaction to content, like writing a reply text. It is the most used feature on social media.

Some websites also include a dislike button, so the user can either vote in favor, against or neutrally. Other websites include more complex web content voting systems; for example, five stars or reaction buttons to show a wider range of emotion to the content.