7search.com (search engine)

hello!
Can anybody using 7search.com for pay per click? I am new to 7search.com;)
Following is my question.
There are two options in 7search account. 1) Keywords 2) categories. We can add keywords by clicking on keyword link. But how do I categorised my keywords? For e.g. if i have pregnancy webpage, I want create 1 set of keywords called pregnancy and accordignly other set of keywords for child, dad, etc.
Also there are no. of categories there in account. what is the use of those categories? I found that we have to create ads for both keywords section as well as categories section. But in categories section, we can only create ads. But in keywords section we can add keywords as well as ads. Why to create ads on both the sides? How do I start creating ads as well as adding keywords to go ahead easily? Please guide me.
Thanks!

Original post by Priti