The 'Annotations' tab is a collection of all your personal notes (ie: graph annotations), your AdWords change history and your Opteo activity, organised in chronological order. 

Here, you can add notes to mark important events in your AdWords accounts and use the 'Jump to' button (top right) to avoid scrolling and jump to a specific date.

You can also annotate your Opteo graphs directly. These notes will be updated to the 'Annotations' tab automatically.

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