Taxonomy is one of the features making Single Latest Posts really competitive, it allows you to control which categories or tags should be listed. Something you should know is when taxonomy parameters are used, if no posts match the criteria then nothing will be shown. Important: categories and tags slugs must be used, instead of names, for example if you want to display posts under the category “My Category” you must use its slug: “my-category” otherwise it won’t work, the same goes for the tags.
If you want to pull posts from multiple categories and/or tags then you must pass slugs separated by commas ex: category=cat1,cat2,cat3 tag=tag1,tag2,tag3.
[slposts number_posts=10 category=usage tag=wordpress-plugin]