Method and system for monitoring and recommending relevant products

A computer-implemented method comprising:

• receiving a negative input from a user, the negative input indicating that the user rejects that a first product is similar to a second product;
• determining, by a database, one or more specification keys of the first product that a database record of the second product contain;
• for each of the specification keys, decreasing a weight counter for the specification key in response to the positive input;
• calculating a closeness score between the first and second products based on values of the specification keys of the first product, values of the specification keys of the second product, and weight counters for the specification keys;
• and
• recommending the first product as a replacement of the second product based on the closeness score.

A computer-implemented method comprising:

• transmitting, to a client terminal or a display device, prices of a plurality of products being sold at a plurality of online merchants;
• if a second product of the plurality of products is not being sold at an individual online merchant of the plurality of online merchants, transmitting a price of a first product being sold at the individual online merchant as a replacement of the second product;
• receiving a positive input from a user, the positive input indicating that the user accepts that a first product is similar to a second product;
• updating a plurality of closeness scores based on the positive input, wherein each of the closeness scores corresponds to two products and indicates how similar these two products are for the user;
• and
• determining whether to keep the price of the first product based on the closeness scores.

A computer system comprising:

• a processor;
• a network interface, coupled to the processor, through which the computer system can retrieve specification information of products from merchant web servers;
• and
• a memory storing instructions which, when executed by the processor, cause the computer system to perform a process including:
• receiving a positive input from a user, the positive input indicating that the user accepts that a first product is similar to a second product;
• determining, by a database, one or more specification keys of the first product that a database record of the second product contain;
• for each of the specification keys, increasing a weight counter for the specification key in response to the positive input;
• calculating a closeness score between the first and second products based on values of the specification keys of the first product, values of the specification keys of the second product, and weight counters for the specification keys;
• and
• recommending the first product as a replacement of the second product based on the closeness score.