What do phrases like good news, new products on the market, big clearance, attention, grand opening, school season and so on belong to? What other words are there?

These are advertising slogans to attract customers' (buyers') attention.

Different slogans are aimed at different groups of people. Decisiveness in the opening season is used to attract students' customers. As for the new product listing and grand opening, it depends on what store it is. These words will appear in large and small shops when goods are discounted and new products (mobile phones, clothes and pants, etc.) are listed.

such words should be found everywhere in commercial streets, such as extra numbers (in the past, newspaper slogans), clearance (sale of goods), sale at a discount, have a look ...

Search Baidu for advertising slogans, and there are many such words.