Since you want to select multiple tags, don't use parameter. Please see my solution in attachment by V10.2.
(1) Pivot Tag1 and Tag2.
(2) Put Pivot Field Values in Column and the measure "Engagement" in Rows.
(3) Filtered out Null (This is optional, you can also keep Null value)
(4) Show filter. Thus you can filters by selecting multiple tags.
Hope it helps.
Post.twbx 8.1 KB
Pl Check Screenshot and attached. If you are on 10.3 or Later , Create a sep[arte file of Tags and Join using Join Calculation on 1 and 1 on your original data source and your Tags File. Then you need to Create a Filter To get Data in This Shape and Set Filter to TRUE
Once you get Data like above, you can create final View as:
Tags.twbx 19.9 KB
Thanks so much! That was really helpful, got me where I needed to be.