I use uBlock Origin on pc and 1Blocker on my mobile (ios) to block ads.
uBlock Origin is hands down the best adblocker I have ever used. I have had it installed for over a year and since then have not seen a single ad. I know that probably sounds a bit of an exaggeration, but no, it really does work that well. It's an extension for your browser, uses open source software and is completely free to use. You can access the code and documentation here;
https://github.com/gorhill/uBlock, but for most people (me included) you can just download it from the following link:
https://ublockorigin.com. It works on all chromium browsers (most popular ones listed below) and to make it even easier, I linked the browser to the download link so you can just click which one you use. The links take you to the web store for each browser.
Just be aware that there are non-original copies of it which use similar names and logos to try and trick you - don't use any other ones apart from these. Also a little side note - in the future it may not work effectively (or at all) due an update to browsers known as Manifest V3 (you can read more about that here:
https://ublockorigin.com) and so you might have to change to uBlock Origin Lite which is a slightly different version.
As for 1Blocker, its only available as an app on ios, not android. It works pretty well but I have't used it for too long so can't say much about it. There is a paid version with more 'features' which I don't think is really needed - the free version works just fine. Another option for android users (and iphone users if you would prefer) is downloading the Firefox or Firefox Nightly browsers and adding uBlock Origin just like you would do on a computer. There are also other ad blocker apps you can use as well.
Sorry for the large amount of text, just trying to help some of you out

I am not very active on here so sorry if I miss any replies/questions.