The press release is very important for marketing and promotion because it is an effective way to promote commercial sites. There are many ways to distribute press releases. The simplest one is the usual mailing list. Such a process is very time-consuming. It can take several weeks to place dozens of publications, and the effectiveness is extremely low. You can choose a few agencies that inspire you more trustworthy and take them on trial service. For example, try Guest post on Techbullion, my friend recommended me the services of this specialist.