>> 2. The average amount of time that people spend on the internet could grow 20% in 10 years
> And you think Google will capture all of that?
No, but it's reasonable to think that Google will capture a share of that growth in proportion to their current share.
>> 3. The amount of advertising Google can show per hour might be 20% higher in 10 years
> Why?
See my earlier comment about Youtube and The Economist. There's also the chance that Twitter decides to outsource their ads to Google.
> > 4. Google might improve its ad algorithm 10% per year - ie. 160% over 10 years.
> 10% more profitable every year for 10 years? I'm not going to say that can't possibly happen, but you'd have to walk me through the physics of exactly how you think that's possible. Do keep in mind that Google makes money by showing people ads. They can increase their profits by:
> 1. Showing more ads per user
> 2. Getting more users
> 3. Charging more for ads (to do this, they'd have to improve efficacy, which, by the way, they don't capture all of because part of the surplus efficiency the advertisers will want for themselves)
> 4. Reducing their costs
When I say "improve its ad algorithm" I'm talking about improving the match between the viewer and the advertiser - and therefore being able to charge more for ads. Based on my personal experience with Google ads I think there's a lot of room for improvement. Here are some examples in addition to the cat food example I gave earlier:
(a) Last year I demonstrated interested in buying a Pixel 2 phone, so Google started showing me Pixel 2 ads. Fair enough. But then it kept showing me the ads even after I had purchased the phone and was viewing the ads on a Pixel 2 phone
(b) Last year I wanted to buy a Macbook Pro, and I went as far as configuring it on the Apple website and putting it in my shopping cart. But then I got cold feet and didn't buy it for 6 months. In that time I never once saw an ad on Facebook or Google for Macbook Pros. Apple were leaving a lot of money on the table by not hooking up with Google.
(c) Google shows me sports betting ads all the time, despite the fact that I've never been in a betting shop or placed an online bet. (Google has 4 years of my location history and 14 years worth of my email history)
(d) Earlier this year I was shown an ad for Audible every single time I opened YouTube. I must have seen 20 ads per day for the same product. It was very annoying and I suspect Google would make more money by showing a variety of ads
(e) When I buy an airline flight Google adds it to my calendar but still shows me ads for that flight.
(f) Browsing the New York Times app just now I'm shown a "Quit Smoking" ad despite the fact that I've never smoked in my life.
(g) I read about a Facebook user who is vegan but saw in her Facebook profile that one of the advertisers specifically targeting her was KFC.