EDIT: This post is inclusive to ALL art forms.
Likes can only go so far for artists. Artists may exclusively upload their artwork to tumblr, or don’t have the time to use other sites and prefer tumblr over deviantART due to its simplicity, but the tagging system can make it harder to navigate. Many artists on tumblr tag with high-traffic tags or use their own tags to prevent tag clogging which eventually become lost. That’s why it’s very important to reblog an artist’s work.
I’m not trying to push you to ruin your blog’s aesthetic or something, nor am I saying that “you must absolutely reblog your favourite artist’s work or you’re trash”, all I’m saying is if you truly want to support your favourite artist, instead of just liking their posts, try to reblog them once in a while. The more reblogs they receive, the more exposure/notes/followers they may receive, and it’s just one of the easiest ways to show you care about them.
*This does not mean to reblog unsourced artwork or works reuploaded to another person’s blog without permission (re:stolen). Nor does this mean to reblog artworks without the artist’s consent, even if this case is slim.
And tag your reblogs. Five good tags can spread the artists’ work to five new areas that may not know the artist exists.