Information providing device, method, and non-transitory medium for interactive search refinement

1. An information providing device comprising:

a communication interface;

at least one memory configured to store computer program code; and

at least one processor configured to access the at least one memory and operate as instructed by the computer program code, the computer program code configure to cause the at least one processor to perform operations comprising:

receive, from a user terminal via the communication interface, a search query;

obtain a ranking of a plurality of objects belonging to a category corresponding to the search query;

collect a plurality of terms relevant to an object that is ranked at an upper position in the obtained ranking, each of the plurality of terms corresponding to at least one from among a text contained in a web page for the object and a search query that triggers the web page to be viewed;

identify a weighting value of each of the plurality of terms;

present to the user terminal via the communication interface (i) search results corresponding to the search query and (ii) a term that is ranked at an upper ranking position of the plurality of terms according to the weighting value of each of the plurality of terms, the term presented as a suggested keyword for search refinement of the object belonging to the category, the suggested keyword rendered within the communication interface as a selectable interface element configured to automatically trigger search refinement upon selection;

receive, from the user terminal via the communication interface, a selection of the suggested keyword by receiving a selection of the selectable interface element;

responsive to receiving the selection of the selectable interface element, automatically trigger refining the search results based on the search query and the suggested keyword;

in response to the automatically triggered search refinement, automatically present an updated communication interface to the user, the updated communication interface comprising refined search results corresponding to the search query and the suggested keyword,

wherein the plurality of objects belonging to the category are hierarchically arranged in a tree structure with each category disposed at a node; and

wherein the weighting value of each of the plurality of terms is defined based on:

(a) an appearance frequency of a corresponding term; and

(b) a contrary category frequency defined by a number of child categories of the category, and a number of child categories where the corresponding term is collected among the child categories.

2. The information providing device according to claim 1 , wherein the web page is one from among a plurality of web pages respectively corresponding to a plurality of shops,

wherein the object belonging to the category is available from each of the plurality of web pages, and

wherein the ranking is obtained for each category to which the object belongs regardless of which of the plurality of shops the object is provided.

3. The information providing device according to claim 1 , wherein the user terminal is connected to the information providing device via a network.

4. The information providing device according to claim 1 , wherein the search results comprise at least two of the plurality of objects belonging to the category.

5. The information providing device according to claim 1 , wherein the weighting value of each of the plurality of terms is defined based on a product of:

(a) the appearance frequency of the corresponding term; and

(b) the contrary category frequency defined by the number of child categories of the category, and the number of child categories where the corresponding term is collected among the child categories.

6. An information providing method executed by an information providing device including a communication interface and at least one processor, the method comprising:

receiving, via the communication interface and under control of the at least one processor, a search query from a user terminal;

obtaining, by the at least one processor, a ranking of a plurality of objects belonging to a category corresponding to the search query;

collecting, by the at least one processor, a plurality of terms relevant to an object that is ranked at an upper position in the obtained ranking, each of the plurality of terms corresponding to at least one from among a text contained in a web page for the object and a search query that triggers the web page to be viewed;

identifying, by the at least one processor, a weighting value of each of the plurality of terms;

presenting, via the communication interface and under control of the at least one processor, (i) search results corresponding to the search query, and (ii) a term that is ranked at an upper ranking position of the plurality of terms according to the weighting value of each of the plurality of terms, the term presented as a suggested keyword for search refinement of the object belonging to the category, the suggested keyword rendered within the communication interface as a selectable interface element configured to automatically trigger search refinement upon selection;

receiving, from the user terminal via the communication interface and under control of the at least one processor, a selection of the suggested keyword by receiving a selection of the selectable interface element;

in response to receiving the selection of the selectable interface element, automatically refining, under control of the at least one processor and based on the input indicating selection of the suggested keyword, the search results based on the search query and the suggested keyword; and

in response to the automatic refining, automatically presenting, via the communication interface and under control of the at least one processor, an updated communication interface comprising refined search results corresponding to the search query and the suggested keyword,

wherein the plurality of objects belonging to the category is hierarchically arranged in a tree structure with each category disposed at a node; and

wherein the weighting value of each of the plurality of terms is defined based on: (a) an appearance frequency of a corresponding term; and (b) a contrary category frequency defined by a number of child categories of the category, and a number of child categories where the corresponding term is collected among the child categories.

7. The information providing method according to claim 6 , wherein the weighting value of each of the plurality of terms is defined based on a product of:

(a) the appearance frequency of the corresponding term; and

(b) the contrary category frequency defined by the number of child categories of the category, and the number of child categories where the corresponding term is collected among the child categories.

8. One or more non-transitory storage mediums storing computer readable instructions, the computer readable instructions, when executed by one or more processors, causing the one or more processors to:

receive, from a user terminal via a communication interface, a search query;

obtain a ranking of a plurality of objects belonging to a category corresponding to the search query;

collect a plurality of terms relevant to an object that is ranked at an upper position in the obtained ranking, each of the plurality of terms corresponding to at least one from among a text contained in a web page for the object and a search query that triggers the web page to be viewed;

identify a weighting value of each of the plurality of terms;

present, to the user terminal via the communication interface, (i) search results corresponding to the search query and (ii) a term that is ranked at an upper ranking position of the plurality of terms according to the weighting value of each of the plurality of terms, the term presented as a suggested keyword for search refinement of the object belonging to the category, the suggested keyword rendered within the communication interface as a selectable interface element configured to automatically trigger search refinement upon selection;

receive, from the user terminal via the communication interface, a selection of the suggested keyword by receiving a selection of the selectable interface element;

in response to receiving the selection of the selectable interface element, automatically refine, based on the input indicating selection of the suggested keyword, the search results based on the search query and the suggested keyword; and

in response to the automatic refining, automatically present to the user terminal via the communication interface, an updated communication interface comprising refined search results corresponding to the search query and the suggested keyword,

wherein the plurality of objects belonging to the category is hierarchically arranged in a tree structure with each category disposed at a node; and

wherein the weighting value of each of the plurality of terms is defined based on:

(a) an appearance frequency of a corresponding term; and

(b) a contrary category frequency defined by a number of child categories of the category, and a number of child categories where the corresponding term is collected among the child categories.

9. The information providing method according to claim 8 , wherein the weighting value of each of the plurality of terms is defined based on a product of:

(a) the appearance frequency of the corresponding term; and

(b) the contrary category frequency defined by the number of child categories of the category, and the number of child categories where the corresponding term is collected among the child categories.