1.
Faceted navigation
and canonicals
#1

2.
https://support.google.com/webmasters/answer/139066?hl=en

3.
Because things are
quite complicated
#1b

4.
Site migrations
#2

5.
“Our developer
said they’re
redirecting
everything”

6.
House of Fraser
http -> https

7.
House of Fraser
http -> https

8.
House of Fraser
~ 3.5M visitors per month gone

9.
Javascript
#3

10.
“Google can
understand
Javascript”

11.
Googlebot
(the crawler)

12.
Caffeine
(the indexer)

13.
Making Modern Web Content Discoverable for Search
Martin Splitt & Tom Greenaway

14.
Dynamic Rendering

15.
Internationalisation
#4

16.
“We’ll redirect users
automatically to their
correct country!”

17.
Can be illegal inside EU

18.
Webmaster guidelines

19.
Hreflang annotations
https://support.google.com/webmasters/answer/189077?hl=en

20.
Schema
#5

21.
https://www.youtube.com/watch?v=xYHK-laEhk4

22.
Good developers
need good SEOs

23.
Mark Williams-Cook
@thetafferboy