- They install themselves on your computer to deliver advertising. They are adware.
- They index web pages for the search engines. They are a kind of database software.
- They follow links on the web and send back information on web page contents to search engines.
- They are software that search engines use to find and deliver the results of queries.
SELECT supply_source, SUM(total_cost)/100000000 AS total_cost_dollars, ((SUM(total_cost)/100000000)/SUM(impressions))*1000 AS avg_cpm, SUM(impressions) AS impressions FROM dsp_inventory GROUP BY 1 ...
False True The correct answer is: True