Can't tag images

I've been struggling with this problem for ages. I've tried looking online and everyone says I must use the details pane, but when I open that up there's no option to tag pictures. Please help

 

1.Open a folder containing photos in Windows Explorer. Click on one photo and take a look in the details pane at the bottom. Among the information provided you’ll see the ‘Tag’ that we’ll be using, plus ‘Rating’ and ‘Authors’ all of which will initially be blank.
2.We’ll start by tagging all the photos with ‘Winter’ and ‘Snow’. To do this, select all the photos, click on ‘Show more details...’ in the Details pane if necessary, click on ‘Add a tag’ next to ‘Tags’, enter ‘Winter; Snow’ (note the semicolon), and click on Save.
3. Next we’ll add the tag of ‘Sheep’ to those containing sheep by selecting the relevant photos, clicking on the current tags (i.e. Winter; Snow), entering ‘Sheep’ in place of ‘Add a tag’, and clicking on Save. Continue in this way until you’ve fully tagged all your photos.
4.If you share your PC or external hard drive with other family members you might also want to add author information, so you can find photos that you took. Again in the details pane, click on ‘Add an author’ next to ‘Authors’, enter your name, and click on Save.
5. Another useful option is to assign star ratings to your photos. In the details pane, click on the stars next to ‘Rating’ to apply 1 to 5 stars (or to revert to no stars click to the left of the first star), before clicking on Save.
6. Having tagged your photos you can search for tags in Windows Explorer. Enter a tag (e.g. ‘Snow’ into the Search box in the top-right corner to display all files with that tag. You can also use AND/OR, e.g. ‘Winter AND Sheep’.
View your folder in Details view to see tags, authors and ratings against each file. If some attributes aren’t shown, right-click in the header (containing ‘Name’, ‘Date’etc.) and select ‘Tags’, ‘Rating’ etc. You can now sort by any of these tags
8.You can also filter files by these attributes in Details view. Pull down the menu to the right of ‘Tags’ and select which tag or tags you want to view. You can also choose to only view photos with certain ratings.