Hi I keep submit links to directories, some with 1-3 PR, some is link, normally 10 links submitted per day, is it worth to do this or it is wasting my time ? Also any good ideas to improve my google's SERP Thanks
It is a part of link building process and not a waste of time actually. You have to build links regularly and you cannot pay to get inclusions for every directory or sites all the times. Most of this kind of directory are free in the beginning so it won't hurt you to get a free links. However, I said that is only a part and you cannot rely solely on these kind of links anyway. You need to get links from authoritative site, big site or corporate site to give a good link profile, regardless the PR.