A plenty number of http connection

I just found a a plenty number ( over 10,000,000 hits per month ) of http connection from a oversea IP , ( we are local small commercial firm , it should not have oversea access , and such plenly of number connection ) , I found that this should be request about searching , may be some searching engine is connecting to our web to find product details .

Therefore , I just would like to ask for advice , is it better to block such connections , what will be the impact if I do that , or is there any best way to solve it or I can leave it unattend ?