Indicative industry benchmarks for Google Search

Returns indicative Google Search medians — click-through rate, cost per click and landing-page conversion rate — for an industry. The table is static, so this call is free, needs no connection and touches no API. Use when: the user asks whether a number is normal, or wants a sanity check before setting expectations. Do not use when: the user wants a target. These are medians across thousands of accounts with different offers, prices, landing pages and countries, gathered from public industry surveys and denominated in US dollars. They cannot tell anyone what their CPC should be, and quoting them as a goal is misleading. The honest benchmark for an account is its own recent history: compare against google_get_campaign_performance over the previous period first, and use this table only to say whether something is in the right order of magnitude. Pass a vertical, or call it with nothing to see the whole table. If the user's industry is not listed, say so rather than picking the nearest row and presenting it as theirs. CPC medians are US dollars. A CPC in another currency is only compared once it has been converted to US dollars and passed with compare_cpc_currency "USD"; otherwise the tool shows it next to the median without a reading. Never present a euro or yen CPC as above or below a dollar median. If you are unsure which industry the user is in, ask them — do not guess.