Yes...
According to the Post, the role involves creating relationships with political officials and celebrities and arranging for them to speak at various campaign events and to the media.
...and as Sylvia pointed out, surrogates can be used in any number of situations where the candidate just can't be present, including but not limited to:
* Panels of arguing talking heads (or, really, hacks), interviews, or other guest appearances on CNN, MSNBC, Fox News, local stations, etc.
* Multiple small-scale fundraisers happening at the same time at any given time across the country; since the candidate can't attend all of them, then a celebrity or local/national politician will stand in as the headliner.
* Multiple volunteer or other organizing events happening at the same time; again, a surrogate or special guest can show up to rally the troops.
In the first case, usually you'll have a press-facing campaign rep or a skilled politician facing the media (and her/his fellow hacks).
In the second, as an example, in the 2015-2016 cycle I was a co-host of several small Bay Area fundraisers for HRC where the headliners were, respectively, Michelle Kwan herself, my hometown mayor, and Cher.
In the third, I've hosted or organized HRC volunteer mobilizations and rallies that collectively featured any number of local politicians, nationally known ones like Sen. Cory Booker, or celebrities like Tony Goldwyn.
TLDR: A national campaign has to be, well, national, and the candidate just can't be everywhere at the same time.