I help people with their hashtags almost daily. For example - if they have a post of a place - they should tag the city or the country.

If they post themselves cooking or eating a meal - it should be tagged with vegan or vegetarian if it is in one of those categories. It should also be tagged with howto and/or the type of food it is.

I can pretty much do this for hours if I feel like it by searching travel and food posts, but there are many more tags people forget to use.
Another one I suggest often is graffiti since I look at it often. That is a good one to put location and the tag graffiti since now you have two ways to be found.

No one is using the search term "life" outside of this nutty place :)

The tags make a big difference on outside searches and internal searches and using good ones that people search will increase payouts and your steemit visibility.