The Machines Take the Wheel: Automation and the Black Box

On September 30, 2019, Google removed average position from its reporting.

If you weren’t managing accounts then, that sentence lands flat. If you were, it was the end of something. Average position was the metric. It was in every client report, every dashboard, every conversation about whether a campaign was working. Advertisers had spent seventeen years optimizing toward a number that told them where their ads showed up.

Google replaced it with impression share metrics, which are arguably more useful and definitely more abstract. But the removal wasn’t really about a metric. It was one entry in a six-year list of controls that got taken away, one at a time, each with a reasonable justification, until the job of managing a paid search account looked almost nothing like it had in 2015.

This is the era where PPC stopped being about pulling levers and started being about feeding a machine.

The keyword stops meaning what it said

The slow part came first. Between 2014 and 2021, Google steadily loosened what a keyword actually matches.

2014 — advertisers lose the option to turn off close variants. Plurals and misspellings now match automatically.
March 2017 — exact match starts ignoring word order and function words. “Flights to New York” and “New York flights” become the same keyword.
September 2018 — exact match expands to same-meaning variants. Implied words and paraphrases now qualify.
July 2019 — same-meaning matching extends to phrase match and broad match modifier.
February 2021 — phrase match absorbs broad match modifier entirely. BMM is retired.

Google’s stated benefit was consistent throughout: advertisers would see roughly 3 to 4% more clicks and conversions with each expansion.

Notice what “exact match” now means. It doesn’t mean the query matched your keyword. It means Google judged the query to mean approximately the same thing. That judgment is not visible to you, and after September 2020, when Google restricted the search terms report to queries with “significant” volume, a portion of it stopped being auditable at all. The backlash was loud enough that Google partially reversed in February 2021, but full visibility never came back.

The keyword — the unit paid search was built on in 1998 — became a suggestion.

Smart Bidding

The bidding side moved in parallel. Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value, Enhanced CPC — launched and progressively pushed from 2016 onward, with manual controls quietly deprecated behind them. Enhanced CPC was finally retired in March 2025.

The mechanism is worth stating plainly, because a lot of contractors think Smart Bidding is a black box for no reason. It isn’t mysterious in principle. Google evaluates every individual auction against a large set of signals — device, time of day, location, browser, audience membership, query, and a great deal more — and predicts the probability that this specific person converts. It then sets a bid for that one auction to hit your target.

No human can bid per-auction on signals they can’t see. That’s the honest case for automation, and it’s a strong one.

The honest case against is narrower: the machine optimizes for whatever you told it a conversion is. If your conversion action counts every form fill including spam, Smart Bidding will efficiently buy spam. Automation didn’t eliminate the skill in this job. It moved the skill upstream, from bid management to defining what counts as success. That’s a harder problem, and it’s easier to get wrong quietly.

The ads write themselves

Responsive Search Ads launched in 2018. You supply up to fifteen headlines and four descriptions; Google assembles combinations and tests them. In February 2021, Google announced RSAs would become the default. On June 30, 2022, Expanded Text Ads — where you wrote the ad, in full, and it ran exactly as written — were sunset.

Between those two moves, on July 24, 2018 (announced June 27), AdWords became Google Ads. The word “words” came out of the name eighteen years after launch. That’s not subtle.

Performance Max

Then the whole structure collapsed into one campaign type.

Performance Max entered beta in 2021 and became globally available on November 2, 2021. It runs across Search, Shopping, YouTube, Display, Discover, Gmail, and Maps from a single campaign. You provide assets, audience signals, a budget, and a goal. Google decides everything else — which channel, which placement, which creative combination, which bid.

In 2022, Google forced the migration: Smart Shopping campaigns auto-upgraded in July, Local campaigns in August, everything complete by September.

The complaint was immediate and it was about visibility. There was no channel-level reporting, no meaningful search term data, no placement control. Jonathan Kagan of 9Rooftops summarized it for MediaPost: the change combined a lack of transparency and insight with something that didn’t have a stellar reputation, while reducing the advertiser’s granular control. Search Engine Land later described the core objection simply — advertisers poured money in and got results out, with minimal visibility into what happened between.

Reporting has improved since. Channel-level data, asset group performance, and search category insights all arrived later. But the fundamental posture didn’t change: PMax is a campaign type where the platform allocates your budget and shows you a summary afterward.

What the era actually took

Line them up and the pattern is unmistakable.

Advertiser controls removed, 2013–2025
What went away	When
Ability to disable close variants	2014
Separate device campaigns	2013, partially returned 2016
Average position	September 2019
Full search terms visibility	September 2020
Broad match modifier	February 2021
Expanded Text Ads	June 2022
Channel and placement control in Shopping and Local	2022
Rule-based attribution models	2021–2023
Enhanced CPC	March 2025

Every one had a defensible rationale. Machine learning genuinely performs better with more data and fewer constraints. Privacy regulation genuinely limited what could be reported. Simplification genuinely helped small advertisers who were never going to build a well-structured account.

All of that can be true while the cumulative effect is also true: the advertiser’s ability to independently verify what they’re buying declined substantially, and the party doing the allocating is the party being paid.

Brin and Page named that conflict in 1998. Nothing about automation resolved it.

What this means for your account

Your conversion tracking is now the steering wheel. This is the whole game. If you’re a plumber and your conversion action counts every call over 15 seconds, you’re teaching the algorithm that wrong numbers are wins. Set call length thresholds that reflect real conversations. Import booked jobs from your CRM if you can. Assign values that reflect actual job margin — a $400 drain clear and a $12,000 repipe should not be worth the same to the bidding algorithm.

Negative keyword lists do the work exact match used to do. With close variants and broad match feeding queries you can’t fully see, negatives are your primary control surface. Build them from the search terms you can see, and maintain them monthly rather than at setup.

Don’t let Performance Max eat your brand terms. PMax will happily spend your budget on people searching your company name — cheap conversions that would have come to you anyway. Use brand exclusions and run a separate branded Search campaign so you can see that spend honestly.

Test with holdouts, not dashboards. When the platform reports on its own performance, the only independent evidence is what happens to your total booked jobs when you change something. Turn a campaign off for two weeks. Look at the calendar, not the interface.

Judge your agency on inputs now. Ask what conversion actions are configured, what values are assigned, what’s excluded, and what the last four experiments were. If the answer is about bid adjustments and ad copy tweaks, they’re doing 2012’s job.

Carryover: the vocabulary that survived

Terms established in this era and the instruments they became.

Smart Bidding · 2016: Conversion-based automated bidding using auction-time signals. The default bidding approach; Target CPA and Target ROAS remain the core strategies.
Close variant · 2014–21: A query Google judged close enough to your keyword. Applies to all match types; no longer possible to disable.
Broad match modifier · retired 2021: The +keyword control. Absorbed into phrase match.
Average position · removed 2019: Where your ad ranked on the page. Replaced by top and absolute top impression share.
Responsive Search Ad · 2018: Machine-assembled ad from supplied headlines and descriptions. The only text ad format available in Search.
Expanded Text Ad · sunset 2022: An ad you wrote in full that ran as written. Gone.
Performance Max · 2021: Cross-channel automated campaign. The default campaign type for Shopping, local, and increasingly everything.
Asset group · 2021: PMax’s replacement for the ad group. Still the organizing unit inside PMax.
Audience signal · 2021: A hint to the algorithm, not a targeting restriction. Same in PMax and now in AI Max.
Data-driven attribution · 2021–23: Modeled credit assignment across touchpoints. The default attribution model in Google Ads.