Social networking websites have had a profound impact on individuals

[mrmvp]

Is there a difference in meaning between "have" and "have had" on the following sentences?

1.Social networking websites have had a profound impact on individuals.
2.Social networking websites have a profound impact on individuals.

 

[Piscean]

Yes. the first talks about the impact from some time in the past until the present.
The second talks about the impact in the present.

 

[emsr2d2]

Is there a difference in meaning between "have" and "have had" on in the following sentences?

1. Social networking websites have had a profound impact on individuals.
2. Social networking websites have a profound impact on individuals.

Please remember to put a space after the full stop when numbering a list of sentences.

 

[teechar]

The present perfect "have had" talks about a time range (started in the past and continues up to, and possibly including, the present). Look at the orange arrow.

The present simple "have" just states a current truth/fact.