This question already has an answer here:
One of the sources of visitors to Stack Exchange sites is search engines like Google. When we are shown the results of a question from Stack Exchange sites on Google, we are shown along with a tag. For example, look at below image.
In the above picture, the character tag is shown along with character tag. That is the most popular tag tagged with the question.
Now, there is another example from Google as shown below.
The above question is from Hinduism Stack Exchange where it is shown along with the tag worship. Now, that is not the most popular tag in the question. I have noticed this with other questions too.
The question is how does the system select the tags which are shown with the question in the search engines?
I noticed that these tags accompany in the tabs in the browser too.
So, how does the system select the tags which are to be shown along with the question on search engines like Google?