Try to make backlinks from high page rank site. This will improve your page rank. Get backlinks from different extensions of domain not just from .com . Try to get from .org , .info , .biz . If possible .gov
We have proper backlinks to our website and web promotion also We are having page rank 4 from last few months, but we are unable to improve it Plz suggest the proper way or tips to improve the page rank.
In order to improve pagerank, you need to keep building more and more quality backlinks, Moreover google usually update pagerank at every 3 or 4 month. So you need to wait for that span
PR matters for quality in each and every thing. Like quality content , inbound links, less bounce rate, traffic from quality sites and many. But prior thing is the information on our site, as per new algorithm google consider quality content first for assigning high page rank.