Click Recommended
Click Recommended (Tag name: クリック推奨) is a tag used for illustrations of large size.
Usually illustrations in pixiv are shown as thumbnails, and clicking on it will show the illustration in whole. This tag is used to create an awareness for users to click on illustrations in order to view them in full detail, which the thumbnail may not properly display beforehand.
It is also used to get people to view animated pictures (if any), or special gimmicks not found in thumbnails.
Regardless of whether this tag is used or not, one should click on the illustrations so one might be able to find something new in it...