Oooo stands for “Obvious observations often omitted” – things that learners do that are so obviously wrong to others, but so very hard to see for the learners themselves. Also, rather helpfully, when you remind people of what they are doing that isn’t “optimal” it makes them say “oooo”!
This section will be kept up-to-date with any and all rather obvious language learning errors that you can easily see in other people, but that are hard to spot in yourself. I’ve found that just by keeping yourself reminded of these then you can save yourself a lot of time.
If you have any suggestions for this page then please let me know so that it can be kept up-to-date!