100%, this has been my soap box for years.

A very easy, effective, multi-layer setup:

1. Browser adblocker

2. Pi hole running locally

3. Pi hole at your home network router level

And 4, not as easy but effective, a firewall like Little Snitch

Edit: the other good news is your old data loses value quickly, so starting today is still very effective: you haven’t missed the boat yet!

This doesn't cover in-app adds on phones over mobile data, which is probably the main vector for the tracking discussed in the article. For that:

1. Adblocking via private DNS (e.g. https://mullvad.net/en/help/dns-over-https-and-dns-over-tls)

2. Prefer websites over native apps wherever possible

3. Browser adblocker

Hosts file adblocking is also possible on a phone where you have root.