...[S]e trata de vincular la misma actividad...
...[I]t is about linking the same activity...
[Caption 21, De Consumidor a Persona > Part 8]
We've discussed the versatile verb tratar ("to treat" or "to attempt to") in this space before. But we didn't yet touch on the common construction tratarse de [algo] ("to be about [something]"), which is seen in the phrase above.
Here's a common question:
¿De que se trata?
"What is it about?"
And one possible answer:
Yabla Spanish se trata de gente interesante.
"Yabla Spanish is about interesting people."
Got that? Have a look at an interesting discussion of the phrase, found here.