The phrase "allow tagging" is correct and usable in written English.
It can be used in contexts where permission or capability to tag something, such as a post or an image, is being discussed.
Example: "Please ensure that the settings are configured to allow tagging in the comments section."
Alternatives: "permit tagging" or "enable tagging".
But, I want to focus on users who opt-in to allow tagging.
Also, while I've noted which services allow tagging of videos, there are a wide variety of tagging options within these services, and many of them also provide comments, rankings, etc. and which are not noted in the chart.
Because of the insertion site biases of these transposons, it has been argued that this technology will not allow tagging more than about 5% of the Drosophila genes and that additional screening would yield very few novel tagged genes/proteins; hence, alternative approaches are needed (Aleksic et al., 2009).
We demonstrate that the nullomers can be added directly to collection devices (FTA paper) to allow tagging during the process of sample collection.
A recent shark summit in Sydney, attended by dozens of international scientists, examined various deterrent measures: physical and visual barriers, sonar technologies, and satellite and acoustic technology to allow tagging and real-time tracking of sharks.
BubbleShare's big weakness is that they do not allow tagging of photos, or photo search.
Topicmarks will allow Tagged to analyze the profiles of its 100 million registered users and match them with others with similar interests and vocabulary.
The Bookmarking site, like del.icio.us and others, has a browser button for easy bookmarking, and allows tagging.
Instagram's shopping feature allows tagging of products that are available for sale, and then letting users purchase them directly within the app.
Austria-based Tag2Find, though, has created a nifty application that allows tagging for any type of desktop file.
The strategy that allows tagging proteins of interest is directed gene targeting.
