Digital Marketing is going to change in 2019 and unfortunately you are not going to like a lot of the changes.
You already have known for sure that every year marketing gets more expensive and competitive too.
Just look at the graph below :-
One of the biggest reason
we are seeing Digital Marketing change so much is because of the adoption of new technologies but also because the web is getting saturated.
1) Algorithm updates to be more complex.
2) Blog will not work work
3) Need to focus on new search engines and new concepts type. l
You need to work with good strategy on website.