Add punctuation: Additionally seeing how communities engage with content off your site provides an increasingly critical view into how your messages spread in the petri dish of social platforms
A: Additionally, seeing how communities engage with content off your site provides an increasingly critical view into how your messages spread in the petri dish of social platforms.

Add punctuation: The sector to be irrigated can be infinitely adjusted between 25 and 360
A: The sector to be irrigated can be infinitely adjusted between 25 and 360.

Add punctuation: When all the files in the filegroup are full the database engine automatically expands one file at a time in a roundrobin manner to allow for more data
A:
When all the files in the filegroup are full, the database engine automatically expands one file at a time in a round-robin manner to allow for more data.